latency vs response time

latency and response time both are nouns.

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

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

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

Other synonyms of latency include latent period, reaction time.

latency (noun)	response time (noun)
the state of being not yet evident or active	the time that elapses between a stimulus and the response to it
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