LOP
LOPE
LOPED
LOPER
LOPERS
LOPES
LOPGRASS
LOPGRASSES
LOPHOBRANCH
LOPHOBRANCHIATE
LOPHOBRANCHS
LOPHODONT
LOPHOPHORATE
LOPHOPHORE
LOPHOPHORES
LOPING
LOPOLITH
LOPOLITHS
LOPPED
LOPPER
LOPPERED
LOPPERING
LOPPERS
LOPPIER
LOPPIES
LOPPIEST
LOPPING
LOPPINGS
LOPPY
LOPS
LOPSIDED
LOPSIDEDLY
LOPSIDEDNESS
LOPSIDEDNESSES
LOPSTICK
LOPSTICKS

36 words start with LOP.