Is “Earworm” a Scrabble word?
Yes
EARWORM
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 Earworm
/ˈɪəwɜːm/
noun
1.A tune that keeps replaying in one's head or that one keeps thinking about, especially if unwanted.
2.(originally United States) Short for corn earworm (“larva of the moths Helicoverpa zea (syn. Heliothis zea) and Helicoverpa armigera, which are agricultural pests”).
3.An earwig.