Opponent vs. Adversary vs. Antagonist

Adversary,Antagonist and Opponent mean a person or a group expresses or manifests an opposite position.

opponent implies little more than position on the other side,as in a debate,election,contest ,or conflict.
- Norris twice knocked down his opponent in the early rounds of the fight...
- His bad behavior provided plenty of ammunition for his opponents.
- the president put the blame squarely on his opponent.
- In debate he was a formidable opponent.
- Rodgers was not an opponent of the new airport.

Adversary is used formally or in literature and implies sharper ,often more personal ,opposition in a struggle for supremacy; an enemy who fights determinedly continuously and relentlessly; a
or someone or a country that has strongly different aims and beliefs from yours. 

- Symon grabbed his adversary by the throat and wrestled him to the ground.
- His political adversaries are creating a certain amount of troubles for him.
- He saw her as his main adversary within the company.
- His sense of humor allowed him to face adversary with equanimity.
 
Antagonist suggests one who in hostile spirits opposes another ,often in a particular contest or struggle,Your antagonist is your opponent or enemy.

- Spassky had never previously lost to his antagonist.
- A duel with an antagonist.
- The woman was forcing her antagonist's face into the mud.
- Allegations concerning his arch political antagonist.

Opponent vs. Adversary vs. Antagonist

Adversary,Antagonist and Opponent mean a person or a group expresses or manifests an opposite position:
opponent implies little more than position on the other side,as in a debate,election,contest ,or conflict.
- Norris twice knocked down his opponent in the early rounds of the fight...
- His bad behavior provided plenty of ammunition for his opponents.
- the president put the blame squarely on his opponent.
- In debate he was a formidable opponent.
- Rodgers was not an opponent of the new airport.

Adversary is used formally or in literature and implies sharper ,often more personal ,opposition in a struggle for supremacy; an enemy who fights determinedly continuously and relentlessly; a
or someone or a country that has strongly different aims and beliefs from yours. 

- Symon grabbed his adversary by the throat and wrestled him to the ground.
- His political adversaries are creating a certain amount of troubles for him.
- He saw her as his main adversary within the company.
- His sense of humor allowed him to face adversary with equanimity.
 
Antagonist suggests one who in hostile spirits opposes another ,often in a particular contest or struggle,Your antagonist is your opponent or enemy.

- Spassky had never previously lost to his antagonist.
- A duel with an antagonist.
- The woman was forcing her antagonist's face into the mud.
- Allegations concerning his arch political antagonist.

To be finally in a situation or place

End up

To finally be in a particular place or state after doing something or because of doing it.

- He came round for a coffee and we ended up in bed together.

- I wondered where the pictures would end up after the auction.

- Keep on doing that and you'll end up in serious trouble.

- A doctor told him he will end up in a wheelchair

end up doing sth

- we ended up taking a taxi there.

- It could end up costing him a small fortune in the long run.

end up with

- Anyone who swims in the river could end up with a nasty stomach upset.

- He tried hard but ended up with a poor grade.

end up on

- We hear stories of people being turfed out and ending up on the streets.

end up as

- He could end up as President.

end up like

- I don't want to end up like my parents.

Wind up

To arrive in a place or unpleasant situation after or because of a series of things that happens.

- There were no hotels available in San Francisco, so we wound up in Oakland.

- He overspent and wound up in debt.

- You know you're going to wind up in court over this.

- I always said he would wind up in prison.

wind up at

- Took a long walk and wound up at the edge of town;

wind up + adjective

- Both partners of the marriage wound up unhappy.

-Ted wound up owing almost $50,000 in loans for graduate school.

- If you take risks like that you’ll wind up dead.

wind up by

- He wound up by attacking Nonconformists.

wind up doing sth

- We eventually wound up staying in a little hotel a few miles from town.

- I wound up wishing I'd never come.

Land up (informal)
To be in an unpleasant situation or place, or to cause someone to be in an unpleasant situation or place, to reach a final position or situation, sometimes after other things have happened.

- She landed up in the hospital with a broken leg.

- I landed up with five broken ribs.

- We traveled around for a while and landed up in Seattle.

- He landed up in a ditch after he lost control of his car.

- Careful—you don’t want to land up in hospital.

land up doing

- he landed up staying in the city forever.

Finish up (British and informal)
If you finish up in a particular place or situation, you are in that place or situation after doing or experiencing a series of events.

- If you’re not careful, you could finish up seriously ill.

- He finished up as one of Britain's greatest architects.

- They had met by chance at university and finished up getting married...

- He's probably going to finish up in jail for business fraud.

- One of the guys tried to bribe a police officer and finished up in jail.

- Brett got into a fight and finished up with a broken wrist.

- She eventually finished up in Boston.

- I always finish up doing most of the work.

Fetch up( in a place) (British and informal)

- To arrive somewhere without intending to

- I fell asleep on the train and fetched up in Glasgow.

- And then, a few years later, he somehow fetched up in Rome.

A sudden change in actions or reactions

Burst out

To suddenly begin a physical action.

- Every one in the room burst out into conversation.

- The audience burst out into applause.

 Burst into

To suddenly begin a conversation, singing, .

- Everyone burst out into conversation/applause/song.

- At one point, members of the security forces reportedly burst into a meeting of demonstrators.

- he burst out speech when we entered.

Break into

To start doing something suddenly:

- The child broke into a run /a song.

- The horse broke into a brisk trot.

- If she lay on her right side, she broke into a paroxysm of coughing.

Explode into

Suddenly begin to move or start a new activity:

 - A bird exploded into flight.

-  He suddenly exploded into action.

A sudden change or occurrence in moods and emotions

Burst out

If you burst into tears, laughter, or song, you suddenly begin to cry, laugh, or sing.

- If anyone said anything to upset me I'd burst out crying

Burst into

To suddenly begin to make a sound, especially to start singing, crying, or laughing.

She burst into a fresh flood of tears

She burst into tears and ran from the kitchen.
...books that cause adults to burst into helpless laughter.

- burst into applause/cheers

Break into

To begin suddenly:

- The child broke into a flood of tears/a run/smile/a loud applause/a song/apologize.

Erupt into
to suddenly start laughing, shouting etc.

- He erupted into loud, desperate sobs.

- The crowd erupted in applause and cheering.

- Her husband erupted in fury.

- The audience erupted into laughter

Explode into

If someone explodes, they express strong feelings suddenly and violently.

- The children exploded into giggles (= suddenly started laughing uncontrollably).

- There was an explosion of applause from the audience at the end of the performance.

- He exploded into a screaming, kicking rage
- Do you fear that you'll burst into tears or explode with anger in front of her?...
- later the same day, he exploded in a paroxysm of rage which continued for half an hour.

 Paroxysm

A sudden, very strong occurrence of an emotion.

- He exploded in a paroxysm of rage.

- He broke into a paroxysm of weeping/ grief.

- In a sudden paroxysm of jealousy he threw her clothes out of the window.

Gust

If you feel a gust of emotion, you feel the emotion suddenly and intensely.

- ...a small gust of pleasure/temper.

- Gusts of laughter came from the next door room.

Outburst

A sudden release of strong emotion:

-  An angry outburst from the prime minister.

- Her comments provoked an outburst of anger from the boss

- A spontaneous outburst of cheers and applause.

- An outburst of violent emotion

 Fit of

A sudden outburst of emotion: a short time during which you laugh or cough a lot in a way that you cannot control a strong sudden physical or emotional reaction you cannot control, for example coughing or laughing:

- She hit him in a fit of anger.

- Pattie shot Tom in a fit of jealous rage.

- The girls collapsed into a fit of the giggles.
- We were all in fits of laughter trying to clear up the mess.

- A fit of rage/jealousy/panic: She smashed the plate in a fit of rage.

- Everyone collapsed in fits of laughter.
 

Burst of

A sudden short period of emotion. A sudden strong feeling or emotion

- Burst of anger/enthusiasm/temper/applause/laughter

-  A sudden burst of enthusiasm

Storm

A strong or violent sudden outburst, as of emotion or excitement:

- A storm of tear/protests/criticism.

- His speech was greeted with a storm of applause...