epicanthic fold vs plica

epicanthic fold and plica both are nouns.

Word	Noun	Adjective	Verb	Adverb
epicanthic fold	Yes	No	No	No
plica	Yes	No	No	No

As nouns, plica is a hypernym of epicanthic fold; that is, plica is a word with a broader meaning than epicanthic fold:

epicanthic fold: a vertical fold of skin over the nasal canthus; typical for many east Asian peoples; sometimes occurs in Down's syndrome
plica: a folded part (as in skin or muscle)

Other hypernyms of epicanthic fold include fold.

epicanthic fold (noun)	plica (noun)
a vertical fold of skin over the nasal canthus; typical for many east Asian peoples; sometimes occurs in Down's syndrome	a folded part (as in skin or muscle)