hag vs beldam

hag and beldam both are nouns.

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

As nouns, hag and beldam are synonyms defined as:

Other synonyms of hag include beldame, crone, witch.

hag (noun)	beldam (noun)
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	a woman of advanced age
an ugly evil-looking old woman	an ugly evil-looking old woman