Is “Quickest” a Scrabble word?
Yes
QUICKEST
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 Quickest
adjective
1.Moving with speed, rapidity or swiftness, or capable of doing so; rapid; fast.
“He's a quick runner.”
2.Occurring in a short time; happening or done rapidly.
“That was a quick meal.”
3.Lively, fast-thinking, witty, intelligent.
“You have to be very quick to be able to compete in ad-lib theatrics.”
Synonyms: extant, live, vital, hotheaded, rattish, short-tempered