speedup vs acceleration

speedup and acceleration both are nouns.

Word	Noun	Adjective	Verb	Adverb
speedup	Yes	No	No	No
acceleration	Yes	No	No	No

As nouns, speedup and acceleration are synonyms defined as:

Other synonyms of speedup include quickening.

speedup (noun)	acceleration (noun)
the act of accelerating; increasing the speed	the act of accelerating; increasing the speed
	an increase in rate of change
	(physics) a rate of increase of velocity