plica vs vocal fold

plica and vocal fold both are nouns.

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

As nouns, vocal fold is a hyponym of plica; that is, vocal fold is a word with a more specific, narrower meaning than plica:

plica: a folded part (as in skin or muscle)
vocal fold: either of two pairs of folds of mucous membrane projecting into the larynx

Other hyponyms of plica include epicanthic fold, epicanthus, plica vocalis, vocal band, vocal cord, ruga, tentorium.

plica (noun)	vocal fold (noun)
a folded part (as in skin or muscle)	either of two pairs of folds of mucous membrane projecting into the larynx