Is “Sinkage” a Scrabble word?
Yes
SINKAGE
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 Sinkage
noun
1.An amount of material involved in a sinking.
2.An area of sunken ground; a depression.
3.The change in draft that a vessel obtains when moving through the water.