decompress vs decompression

decompress is not a noun while decompression is a noun.

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

decompress (noun)	decompression (noun)
	relieving pressure (especially bringing a compressed person gradually back to atmospheric pressure)
	restoring compressed information to its normal form for use or display

decompress (verb)	decompression (verb)
become less tense, rest, or take one's ease
decrease the pressure of
restore to its uncompressed form