cephalohematoma vs hematocyst

cephalohematoma and hematocyst both are nouns.

Word	Noun	Adjective	Verb	Adverb
cephalohematoma	Yes	No	No	No
hematocyst	Yes	No	No	No

As nouns, hematocyst is a hypernym of cephalohematoma; that is, hematocyst is a word with a broader meaning than cephalohematoma:

cephalohematoma: a collection of blood under the scalp of a newborn; caused by pressure during birth
hematocyst: a cyst containing blood

Other hypernyms of cephalohematoma include blood cyst, hemorrhagic cyst.

cephalohematoma (noun)	hematocyst (noun)
a collection of blood under the scalp of a newborn; caused by pressure during birth	a cyst containing blood