uptake vs re-uptake

uptake and re-uptake both are nouns.

Word	Noun	Adjective	Verb	Adverb
uptake	Yes	No	No	No
re-uptake	Yes	No	No	No

As nouns, re-uptake is a hyponym of uptake; that is, re-uptake is a word with a more specific, narrower meaning than uptake:

Other hyponyms of uptake include reuptake.

uptake (noun)	re-uptake (noun)
the process of taking food into the body through the mouth (as by eating)	a process of using up or consuming again
a process of taking up or using up or consuming