reaction time vs latency

reaction time and latency both are nouns.

Word	Noun	Adjective	Verb	Adverb
reaction time	Yes	No	No	No
latency	Yes	No	No	No

As nouns, reaction time and latency are synonyms defined as:

reaction time and latency: the time that elapses between a stimulus and the response to it

Other synonyms of reaction time include latent period, response time.

reaction time (noun)	latency (noun)
the time that elapses between a stimulus and the response to it	the state of being not yet evident or active
	the time that elapses between a stimulus and the response to it
	(computer science) the time it takes for a specific block of data on a data track to rotate around to the read/write head