installation vs installing

installation and installing both are nouns.

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

As nouns, installation and installing are synonyms defined as:

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

Other synonyms of installation include installment, instalment.

installation (noun)	installing (noun)
the act of installing something (as equipment)	the act of installing something (as equipment)
a building or place that provides a particular service or is used for a particular industry
a formal entry into an organization or position or office