As nouns the difference between grandmother and grandmommy
is that grandmother is a mother of someone's parent while grandmommy is (us|informal) grandmother.
grandmother
Noun
(
en noun)
A mother of someone's parent.
A female ancestor or progenitor.
Synonyms
* (
sense,
mother of someone's parent) baba (
loanword from Eastern Europe), gammy, gram, gramma, gran, grandma, grandmom, granny, eldmother/eldermother, mimi, nan (
British slang), nanna, nanny, Mamaw
Antonyms
* (with regard to gender) grandfather
* (with regard to ancestry) granddaughter, grandson, grandchild
Hyponyms
* (l)
* (l)
Hypernyms
* (l)
Derived terms
* (l)
Related terms
* (l)
grandmommy
English
Noun
(grandmommies)
(US, informal) grandmother