install vs installment

install is not a noun while installment is a noun.

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

install (noun)	installment (noun)
	the act of installing something (as equipment)
	a part of a broadcast serial
	a part of a published serial
	a payment of part of a debt; usually paid at regular intervals

install (verb)	installment (verb)
set up for use
place
put into an office or a position