love bite vs erythema

love bite and erythema both are nouns.

Word	Noun	Adjective	Verb	Adverb
love bite	Yes	No	No	No
erythema	Yes	No	No	No

As nouns, erythema is a hypernym of love bite; that is, erythema is a word with a broader meaning than love bite:

love bite: a temporary red mark on a person's skin resulting from kissing or sucking by their lover
erythema: abnormal redness of the skin resulting from dilation of blood vessels (as in sunburn or inflammation)

love bite (noun)	erythema (noun)
a temporary red mark on a person's skin resulting from kissing or sucking by their lover	abnormal redness of the skin resulting from dilation of blood vessels (as in sunburn or inflammation)