introduction vs speech

introduction and speech both are nouns.

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

introduction (noun)	speech (noun)
the act of putting one thing into another	the mental faculty or power of vocal communication
the act of beginning something new	(language) communication by word of mouth
the act of starting something for the first time; introducing something new	the act of delivering a formal spoken communication to an audience
the first section of a communication	words making up the dialogue of a play
formally making a person known to another or to the public	a lengthy rebuke
a basic or elementary instructional text	the exchange of spoken words
a new proposal	your characteristic style or manner of expressing yourself orally
	something spoken