vocal fold vs vocal cord

vocal fold and vocal cord both are nouns.

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

As nouns, vocal fold and vocal cord are synonyms defined as:

vocal fold and vocal cord: either of two pairs of folds of mucous membrane projecting into the larynx

Other synonyms of vocal fold include plica vocalis, vocal band.

vocal fold (noun)	vocal cord (noun)
either of two pairs of folds of mucous membrane projecting into the larynx	either of two pairs of folds of mucous membrane projecting into the larynx