commence vs introduce

commence and introduce both are verbs.

Word	Noun	Adjective	Verb	Adverb
commence	No	No	Yes	No
introduce	No	No	Yes	No

As verbs, introduce is a hyponym of commence; that is, introduce is a word with a more specific, narrower meaning than commence:

commence (verb)	introduce (verb)
take the first step or steps in carrying out an action	be a precursor of
set in motion, cause to start	place, fit, or thrust (something) into another thing
get off the ground	put before (a body)
	cause to come to know personally
	furnish with a preface or introduction
	bring before the public for the first time, as of an actor, song, etc.
	put or introduce into something
	bring something new to an environment
	bring in or establish in a new place or environment
	bring in a new person or object into a familiar environment