introduce vs usher in

introduce and usher in both are verbs.

Word	Noun	Adjective	Verb	Adverb
introduce	No	No	Yes	No
usher in	No	No	Yes	No

As verbs, introduce and usher in are synonyms defined as:

Other synonyms of introduce include inaugurate.

introduce (verb)	usher in (verb)
be a precursor of	be a precursor of
place, fit, or thrust (something) into another thing
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