Is “Billow” a Scrabble word?
Yes
BILLOW
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 Billow
noun
1.A large wave, swell, surge, or undulating mass of something, such as water, smoke, fabric or sound
verb
1.To surge or roll in billows.
2.To swell out or bulge.