Is “Jackscrew” a Scrabble word?
Yes
JACKSCREW
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 Jackscrew
noun
1.A jack (mechanical lifting device) which is operated by turning a leadscrew.