intumescency vs lump

intumescency and lump both are nouns.

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

As nouns, lump is a hypernym of intumescency; that is, lump is a word with a broader meaning than intumescency:

Other hypernyms of intumescency include puffiness, swelling.

intumescency (noun)	lump (noun)
the increase in volume of certain substances when they are heated (often accompanied by release of water)	a compact mass
swelling up with blood or other fluids (as with congestion)	a large piece of something without definite shape
	an awkward stupid person
	an abnormal protuberance or localized enlargement

intumescency (verb)	lump (verb)
	group or chunk together in a certain order or place side by side
	put together indiscriminately