dry up vs dehydrate

dry up and dehydrate both are verbs.

Word	Noun	Adjective	Verb	Adverb
dry up	No	No	Yes	No
dehydrate	No	No	Yes	No

As verbs, dry up and dehydrate are synonyms defined as:

Other synonyms of dry up include desiccate, exsiccate.

dry up (verb)	dehydrate (verb)
lose water or moisture	lose water or moisture
dry up and shrivel due to complete loss of moisture	remove water from
	preserve by removing all water and liquids from