GOOK /ɡuk/ ► audio Scrabble 9 Words With Friends 10 Definition noun any thick, viscous matter. — synonyms: sludge, slime, goo, goop, guck, gunk, muck, ooze See all 3 words you can make from GOOK → 4-letter words Words starting with G Words ending with K ← Unscramble different letters