hymen vs virginal membrane

hymen and virginal membrane both are nouns.

Word	Noun	Adjective	Verb	Adverb
hymen	Yes	No	No	No
virginal membrane	Yes	No	No	No

As nouns, hymen and virginal membrane are synonyms defined as:

hymen and virginal membrane: a fold of tissue that partly covers the entrance to the vagina of a virgin

Other synonyms of hymen include maidenhead.

hymen (noun)	virginal membrane (noun)
a fold of tissue that partly covers the entrance to the vagina of a virgin	a fold of tissue that partly covers the entrance to the vagina of a virgin