payment vs amortisation

payment and amortisation both are nouns.

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

As nouns, amortisation is a hyponym of payment; that is, amortisation is a word with a more specific, narrower meaning than payment:

payment: the act of paying money
amortisation: payment of an obligation in a series of installments or transfers

payment (noun)	amortisation (noun)
the act of paying money	payment of an obligation in a series of installments or transfers
an act of requiting; returning in kind	the reduction of the value of an asset by prorating its cost over a period of years
a sum of money paid or a claim discharged