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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Viscous stuff. 3 letters:

TAR: Viscous stuff.
GOO: Viscous stuff
GOOP: Viscous stuff
SLIME: Viscous stuff
GLUE: Viscous stuff.
GOOP: Sticky, viscous stuff
GOOK: Viscous stuff