debtor vs mortgagor

debtor and mortgagor both are nouns.

Word	Noun	Adjective	Verb	Adverb
debtor	Yes	No	No	No
mortgagor	Yes	No	No	No

As nouns, mortgagor is a hyponym of debtor; that is, mortgagor is a word with a more specific, narrower meaning than debtor:

debtor: a person who owes a creditor; someone who has the obligation of paying a debt
mortgagor: the person who gives a mortgage in return for money to be repaid

Other hyponyms of debtor include deadbeat, defaulter, fly-by-night, mortgager.

debtor (noun)	mortgagor (noun)
a person who owes a creditor; someone who has the obligation of paying a debt	the person who gives a mortgage in return for money to be repaid