speech vs introduction

speech and introduction both are nouns.

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

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