Is “Hardest” a Scrabble word?
Yes
HARDEST
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 Hardest
/ˈhɑːdɪst/
adjective
1.(of material or fluid) Having a severe property; presenting difficulty.
2.(personal or social) Having a severe property; presenting difficulty.
3.Unquestionable.
“hard evidence; a hard requirement”
Synonyms: strong, confusing, difficult, puzzling, tough, tricky