Is “Upthrow” a Scrabble word?
Yes
UPTHROW
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 Upthrow
noun
1.A fault in which a mass of material has been thrown up from below.
verb
1.To throw or cast upwards.
2.To throw up (a mass of material) from below, causing a fault.
3.(of a mass of material) To be thrown up from below, causing a fault.