circularisation vs circularise

circularisation is a noun but circularise is not a noun.

Word	Noun	Adjective	Verb	Adverb
circularisation	Yes	No	No	No
circularise	No	No	Yes	No

circularisation (noun)	circularise (noun)
circulating printed notices as a means of advertising

circularisation (verb)	circularise (verb)
	cause to become widely known
	distribute circulars to
	canvass by distributing letters