megalith

Noun

A huge stone used in prehistoric monuments.
memorial consisting of a very large stone forming part of a prehistoric structure (especially in western Europe)
A large stone slab making up a prehistoric monument, or part of such a monument.
A prehistoric monument made up of one or more large stones.
A large stone or block of stone used in the construction of a modern structure.

Examples

Building MEGALITH on the board was a monumental achievement for his score.

Origin / Etymology

PIE word
*méǵh₂s
From mega- (prefix meaning ‘very large, great’) + -lith (suffix meaning ‘stone’), a back-formation from megalithic probably modelled after monolith. from Ancient Greek λίθος (líthos, “stone”)

Synonyms

megalithic structure

Scrabble Score: 14

megalith: valid Scrabble (US) TWL Word
megalith: valid Scrabble Word in Merriam-Webster MW Dictionary
megalith: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 16

megalith: valid Words With Friends Word