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

Crossword clues for Swamp, briefly 4 letters:

QUAG: Swamp, briefly
CROC: Swamp denizen, briefly
CROC: Swamp critter, briefly
CROCS: Swamp creatures, briefly
GATOR: Swamp predator, briefly