introduction vs commencement

introduction and commencement both are nouns.

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

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

Other hypernyms of introduction include beginning, start.

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

introduction: the act of starting something for the first time; introducing something new
commencement: the act of starting something

Other hypernyms of introduction include beginning, start.

introduction (noun)	commencement (noun)
the act of putting one thing into another	the act of starting something
the act of beginning something new	an academic exercise in which diplomas are conferred
the act of starting something for the first time; introducing something new	the time at which something is supposed to begin
the first section of a communication
formally making a person known to another or to the public
a basic or elementary instructional text
a new proposal