uptake vs imbibition

uptake and imbibition both are nouns.

Word	Noun	Adjective	Verb	Adverb
uptake	Yes	No	No	No
imbibition	Yes	No	No	No

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

uptake: the process of taking food into the body through the mouth (as by eating)
imbibition: the act of consuming liquids

Other hyponyms of uptake include eating, feeding, deglutition, drink, swallow, suck, sucking, suction, drinking, imbibing.

uptake (noun)	imbibition (noun)
the process of taking food into the body through the mouth (as by eating)	the act of consuming liquids
a process of taking up or using up or consuming	(chemistry) the absorption of a liquid by a solid or gel