fraternise vs socialise

fraternise and socialise both are verbs.

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

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

fraternise: 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 fraternise include socialize.

fraternise (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