dislike vs antagonism

dislike and antagonism both are nouns.

Word	Noun	Adjective	Verb	Adverb
dislike	Yes	No	Yes	No
antagonism	Yes	No	No	No

As nouns, antagonism is a hyponym of dislike; that is, antagonism is a word with a more specific, narrower meaning than dislike:

dislike (noun)	antagonism (noun)
an inclination to withhold approval from some person or group	(biochemistry) interference in or inhibition of the physiological action of a chemical substance by another having a similar structure
a feeling of aversion or antipathy	an actively expressed feeling of dislike and hostility
	the relation between opposing principles or forces or factors
	a state of deep-seated ill-will

dislike (verb)	antagonism (verb)
have or feel a dislike or distaste for