decalescent vs decalescence

decalescent is not a noun while decalescence is a noun.

Word	Noun	Adjective	Verb	Adverb
decalescent	No	Yes	No	No
decalescence	Yes	No	No	No

decalescent (noun)	decalescence (noun)
	phenomenon that occurs when a metal is being heated and there is a sudden slowing in the rate of temperature increase; slowing is caused by a change in the internal crystal structure of the metal

decalescent (adjective)	decalescence (adjective)
absorbing heat without increase in temperature when heated beyond a certain point