manner of speaking vs speech

manner of speaking and speech both are nouns.

Word	Noun	Adjective	Verb	Adverb
manner of speaking	Yes	No	No	No
speech	Yes	No	No	No

As nouns, manner of speaking and speech are synonyms defined as:

manner of speaking and speech: your characteristic style or manner of expressing yourself orally

Other synonyms of manner of speaking include delivery.

manner of speaking (noun)	speech (noun)
your characteristic style or manner of expressing yourself orally	the mental faculty or power of vocal communication
	(language) communication by word of mouth
	the act of delivering a formal spoken communication to an audience
	words making up the dialogue of a play
	a lengthy rebuke
	the exchange of spoken words
	your characteristic style or manner of expressing yourself orally
	something spoken