intumescency vs intumesce

intumescency is a noun but intumesce is not a noun.

Word	Noun	Adjective	Verb	Adverb
intumescency	Yes	No	No	No
intumesce	No	No	Yes	No

intumescency (noun)	intumesce (noun)
the increase in volume of certain substances when they are heated (often accompanied by release of water)
swelling up with blood or other fluids (as with congestion)

intumescency (verb)	intumesce (verb)
	expand abnormally
	move upwards in bubbles, as from the effect of heating; also used metaphorically