begin vs introduce

begin and introduce both are verbs.

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

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

begin (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
begin to speak or say	put before (a body)
begin to speak, understand, read, and write a language	cause to come to know personally
achieve or accomplish in the least degree, usually used in the negative	furnish with a preface or introduction
begin an event that is implied and limited by the nature or inherent function of the direct object	bring before the public for the first time, as of an actor, song, etc.
have a beginning, in a temporal, spatial, or evaluative sense	put or introduce into something
be the first item or point, constitute the beginning or start, come first in a series	bring something new to an environment
have a beginning characterized in some specified way	bring in or establish in a new place or environment
have a beginning, of a temporal event	bring in a new person or object into a familiar environment