installment vs installation

installment and installation both are nouns.

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

As nouns, installment and installation are synonyms defined as:

installment and installation: the act of installing something (as equipment)

Other synonyms of installment include installing, instalment.

installment (noun)	installation (noun)
the act of installing something (as equipment)	the act of installing something (as equipment)
a part of a broadcast serial	a building or place that provides a particular service or is used for a particular industry
a part of a published serial	a formal entry into an organization or position or office
a payment of part of a debt; usually paid at regular intervals