tombstone is a valid English word

Scrabble validity: valid ( international - Sowpods, US - Twl06 )
iScramble validity: valid
QuickWords validity: valid

Meanings

Noun (COUNTABLE)

A headstone marking a person's grave.
• Synonym: headstone, gravestone
(mathematics) The symbol "∎" marking the end of a proof.
• Synonym: halmos
(computing Microsoft Windows) A marker that takes the place of deleted data, allowing for replication of the deletion across servers etc.

Verb

(UK intransitive) To take part in tombstoning: to jump into the sea, etc. from a cliff or other high point so as to enter the water vertically straight.
(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.
(transitive computing Microsoft Windows) To replace (an object or data) with a tombstone marker.

tombstone is a Scrabble valid word

tombstone

• International English (Sowpods) - The word is valid in Scrabble ✔
• US English (TWL06) - The word is valid in Scrabble ✔
• 00 points

tombstone is an iScramble, QuickWords valid word

tombstone

• The word is valid in iScramble ✔
• The word is valid in QuickWords ✔
• 00 points

Same letters words (Anagrams)

• none

Same letters plus one

• BOTTOMNESS
• TOMBSTONED
• TOMBSTONER
• TOMBSTONES

Same letters minus one

• BOTTOMES
• BOTTONES