grassumar
nafnorð hvorugkyn
Fallbeygingar
Eintala
eintala með greini
nefnifall
grassumar
grassumarið
þolfall
grassumar
grassumarið
þágufall
grassumri
grassumrinu
eignarfall
grassumars
grassumarsins
Fleirtala
fleirtala með greini
nefnifall
grassumur
grassumringrassumurin
þolfall
grassumur
grassumringrassumurin
þágufall
grassumrum
grassumrunum
eignarfall
grassumra
grassumranna