vocal band vs plica

vocal band and plica both are nouns.

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

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

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

Other hypernyms of vocal band include fold.

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