preserve vs dehydrate

preserve is a noun but dehydrate is not a noun.

Word	Noun	Adjective	Verb	Adverb
preserve	Yes	No	Yes	No
dehydrate	No	No	Yes	No

As verbs, dehydrate is a hyponym of preserve; that is, dehydrate is a word with a more specific, narrower meaning than preserve:

Other hyponyms of preserve include freeze-dry, conserve, desiccate, pickle, salt, can, put up, tin, refrigerate, cure, corn.

preserve (noun)	dehydrate (noun)
fruit preserved by cooking with sugar
a reservation where animals are protected
a domain that seems to be specially reserved for someone

preserve (verb)	dehydrate (verb)
prevent (food) from rotting	lose water or moisture
keep in safety and protect from harm, decay, loss, or destruction	remove water from
to keep up and reserve for personal or special use	preserve by removing all water and liquids from
keep or maintain in unaltered condition; cause to remain or last
maintain in safety from injury, harm, or danger
keep undisturbed for personal or private use for hunting, shooting, or fishing