beldam vs hag

beldam and hag both are nouns.

Word	Noun	Adjective	Verb	Adverb
beldam	Yes	No	No	No
hag	Yes	No	No	No

As nouns, beldam and hag are synonyms defined as:

Other synonyms of beldam include beldame, crone, witch.

beldam (noun)	hag (noun)
a woman of advanced age	eellike cyclostome having a tongue with horny teeth in a round mouth surrounded by eight tentacles; feeds on dead or trapped fishes by boring into their bodies
an ugly evil-looking old woman	an ugly evil-looking old woman