Is “Trebled” a Scrabble word?
Yes
TREBLED
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 Trebled
verb
1.To multiply by three; to make into three parts, layers, or thrice the amount.
2.To become multiplied by three or increased threefold.
3.To make a shrill or high-pitched noise.
Synonyms: keen, screech, shrill, triple, whine