installment vs payment

installment and payment both are nouns.

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

As nouns, payment is a hypernym of installment; that is, payment is a word with a broader meaning than installment:

installment (noun)	payment (noun)
the act of installing something (as equipment)	the act of paying money
a part of a broadcast serial	an act of requiting; returning in kind
a part of a published serial	a sum of money paid or a claim discharged
a payment of part of a debt; usually paid at regular intervals