tombstone

As verbs the difference between tombstoned and tombstone

is that tombstoned is (tombstone) while tombstone is (surfing) for a surfboard to stand upright half-submerged in the water (like a tombstone, above) because the surfer is underwater with his or her legrope pulled tight often this indicates a surfer in difficulty, either held down by the power of a wave or unconscious and unable to get to the surface.

As a noun tombstone is

a headstone marking the person's grave.

As nouns the difference between tombstone and tombstoner

is that tombstone is a headstone marking the person's grave while tombstoner is (informal|british) a person who engages in the activity of tombstoning.

As a verb tombstone

is (surfing) for a surfboard to stand upright half-submerged in the water (like a tombstone, above) because the surfer is underwater with his or her legrope pulled tight often this indicates a surfer in difficulty, either held down by the power of a wave or unconscious and unable to get to the surface.

As nouns the difference between gravemarker and tombstone

is that gravemarker is while tombstone is a headstone marking the person's grave.

As a verb tombstone is

(surfing) for a surfboard to stand upright half-submerged in the water (like a tombstone, above) because the surfer is underwater with his or her legrope pulled tight often this indicates a surfer in difficulty, either held down by the power of a wave or unconscious and unable to get to the surface.