Drying up and Freeze-drying

Drying up noun - The process of extracting moisture.

Freeze-drying and drying up are semantically related. In some cases you can use "Freeze-drying" instead a verb "Drying up".

Freeze-drying noun - A method of drying food or blood plasma or pharmaceuticals or tissue without destroying their physical structure; material is frozen and then warmed in a vacuum so that the ice sublimes.

Drying up and freeze-drying are semantically related. Sometimes you can use "Drying up" instead the phrase "Freeze-drying" as a noun or a verb.