Toll is good, and so is limb, but Fall-- as in downward motion, is what leaves do in autumn, so its no good,

on the other hand, if you checked it out, you would have found grave, (serious) grave (hole in the ground/burial spot) and grave (to rub with corse sand, and change the surface, which leads to engrave-- a third word.)

Each of these word have differnt roots.
1-gravis-- heavy (serious)
2-graef-- to dig out
3-grafe-- sand (to rub with)

but i didn't chech them all out.