installment vs installing

installment and installing both are nouns.

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

As nouns, installment and installing are synonyms defined as:

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

Other synonyms of installment include installation, instalment.

installment (noun)	installing (noun)
the act of installing something (as equipment)	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