LAMPBLACKS
Scrabble letter values: L1A1M3P3B3L1A1C3K5S1 = 22
Definition
LAMPBLACKS is the plural of LAMPBLACK.
noun LAMPBLACK: a black colloidal substance consisting wholly or principally of amorphous carbon and used to make pigments and ink.
Synonyms of LAMPBLACK: carbon_black, soot, smut, crock