fraternise vs fraternisation

fraternise is not a noun while fraternisation is a noun.

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

fraternise (noun)	fraternisation (noun)
	associating with others in a brotherly or friendly way; especially with an enemy

fraternise (verb)	fraternisation (verb)
be on friendly terms with someone, as if with a brother, especially with an enemy