compress vs decompress

compress is a noun but decompress is not a noun.

Word	Noun	Adjective	Verb	Adverb
compress	Yes	No	Yes	No
decompress	No	No	Yes	No

compress (noun)	decompress (noun)
a cloth pad or dressing (with or without medication) applied firmly to some part of the body (to relieve discomfort or reduce fever)

compress (verb)	decompress (verb)
squeeze or press together	become less tense, rest, or take one's ease
make more compact by or as if by pressing	decrease the pressure of
	restore to its uncompressed form