re-uptake vs uptake

re-uptake and uptake both are nouns.

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

As nouns, uptake is a hypernym of re-uptake; that is, uptake is a word with a broader meaning than re-uptake:

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