amortisation vs amortise

amortisation is a noun but amortise is not a noun.

Word	Noun	Adjective	Verb	Adverb
amortisation	Yes	No	No	No
amortise	No	No	Yes	No

amortisation (noun)	amortise (noun)
payment of an obligation in a series of installments or transfers
the reduction of the value of an asset by prorating its cost over a period of years

amortisation (verb)	amortise (verb)
	liquidate gradually