Is “Swiftest” a Scrabble word?
Yes
SWIFTEST
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 Swiftest
adjective
1.Fast; quick; rapid.
2.Capable of moving at high speeds.