smile
If you add an O to grin, you can make groin.
grin
smile, smirk
A synonym for the word grin is smile. An antonym for the word grin is frown. Synonyms: gleam, glow, grin, laugh, radiate, shine, smirk Antonyms: frown, scowl
The word 'grin' is both a verb and a noun.The noun 'grin' is a singular, common, concrete noun; a word for a wide smile; a word for a thing.The noun form of the verb to grin is the gerund, grinning.
She couldn't help but grin when she saw her surprise birthday party waiting for her.
He couldn't help but grin from ear to ear when he saw his surprise birthday party.
Grin
grin
smile
smirk
Grin.