putrescence vs putrid

putrescence is a noun but putrid is not a noun.

Word	Noun	Adjective	Verb	Adverb
putrescence	Yes	No	No	No
putrid	No	Yes	No	No

putrescence (noun)	putrid (noun)
the quality of rotting and becoming putrid
in a state of progressive putrefaction

putrescence (adjective)	putrid (adjective)
	of or relating to or attended by putrefaction
	morally corrupt or evil
	in an advanced state of decomposition and having a foul odor