installation vs commencement

installation and commencement both are nouns.

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

As nouns, commencement is a hypernym of installation; that is, commencement is a word with a broader meaning than installation:

Other hypernyms of installation include beginning, start.

installation (noun)	commencement (noun)
the act of installing something (as equipment)	the act of starting something
a building or place that provides a particular service or is used for a particular industry	an academic exercise in which diplomas are conferred
a formal entry into an organization or position or office	the time at which something is supposed to begin