fraternize vs socialise

fraternize and socialise both are verbs.

Word	Noun	Adjective	Verb	Adverb
fraternize	No	No	Yes	No
socialise	No	No	Yes	No

As verbs, socialise is a hypernym of fraternize; that is, socialise is a word with a broader meaning than fraternize:

fraternize: be on friendly terms with someone, as if with a brother, especially with an enemy
socialise: take part in social activities; interact with others

Other hypernyms of fraternize include socialize.

fraternize (verb)	socialise (verb)
be on friendly terms with someone, as if with a brother, especially with an enemy	make conform to socialist ideas and philosophies
	prepare for social life
	train for a social environment
	take part in social activities; interact with others