hematoma vs intumescence

hematoma and intumescence both are nouns.

Word	Noun	Adjective	Verb	Adverb
hematoma	Yes	No	No	No
intumescence	Yes	No	No	No

As nouns, intumescence is a hypernym of hematoma; that is, intumescence is a word with a broader meaning than hematoma:

Other hypernyms of hematoma include intumescency.

hematoma (noun)	intumescence (noun)
a localized swelling filled with blood	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)