introduction vs intro

introduction and intro both are nouns.

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

As nouns, introduction and intro are synonyms defined as:

introduction and intro: formally making a person known to another or to the public

Other synonyms of introduction include presentation.

introduction (noun)	intro (noun)
the act of putting one thing into another	formally making a person known to another or to the public
the act of beginning something new	a brief introductory passage to a piece of popular music
the act of starting something for the first time; introducing something new
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