unitisation vs unitise

unitisation is a noun but unitise is not a noun.

Word	Noun	Adjective	Verb	Adverb
unitisation	Yes	No	No	No
unitise	No	No	Yes	No

unitisation (noun)	unitise (noun)
conversion of an investment trust into a unit investment trust
the joint development of a petroleum resource that straddles territory controlled by different companies
the act of packaging cargo into unit loads
(psychology) the configuration of smaller units of information into large coordinated units

unitisation (verb)	unitise (verb)
	separate or classify into units
	make into a unit
	divide (bulk material) and process as units