preserve vs freeze-dry

preserve is a noun but freeze-dry is not a noun.

Word	Noun	Adjective	Verb	Adverb
preserve	Yes	No	Yes	No
freeze-dry	No	No	Yes	No

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

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

preserve (noun)	freeze-dry (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)	freeze-dry (verb)
prevent (food) from rotting	preserve by rapid freezing and subsequently drying in a vacuum
keep in safety and protect from harm, decay, loss, or destruction
to keep up and reserve for personal or special use
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