Is “Tachyon” a Scrabble word?
Yes
TACHYON
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Tachyon
/ˈtæki.ɒn/
noun
1.A hypothetical particle that travels faster than the speed of light.
2.A flaw in a physical theory that predicts the existence of tachyons or similar paradoxical results. Compare with ghost.
Synonyms: tachyonic particle