mammy vs ma

mammy and ma both are nouns.

Word	Noun	Adjective	Verb	Adverb
mammy	Yes	No	No	No
ma	Yes	No	No	No

As nouns, mammy and ma are synonyms defined as:

Other synonyms of mammy include mama, mamma, mom, momma, mommy, mum, mumma, mummy.

mammy (noun)	ma (noun)
informal terms for a mother	informal terms for a mother
an offensive term for a Black nursemaid in the southern U.S.