puffiness vs hematocele

puffiness and hematocele both are nouns.

Word	Noun	Adjective	Verb	Adverb
puffiness	Yes	No	No	No
hematocele	Yes	No	No	No

As nouns, hematocele is a hyponym of puffiness; that is, hematocele is a word with a more specific, narrower meaning than puffiness:

puffiness: an abnormal protuberance or localized enlargement
hematocele: swelling caused by blood collecting in a body cavity (especially a swelling of the membrane covering the testis)

puffiness (noun)	hematocele (noun)
lack of elegance as a consequence of being pompous and puffed up with vanity	swelling caused by blood collecting in a body cavity (especially a swelling of the membrane covering the testis)
an abnormal protuberance or localized enlargement