Swamp Thing is a fictional character created by DC Comics. The crossword solutions for the term Swamp Thing are PEAT (4 letters), EGRET (5 letters), CROC (4 letters), MIASMA (6 letters), SEDGE (5 letters), REED (4 letters), and GATOR (5 letters). PEAT is an accumulation of partially decayed vegetation or organic matter found in wetlands. EGRET is a type of white heron. CROC is short for crocodile. MIASMA is a noxious, poisonous vapor or smell. SEDGE is a type of grass-like plant that grows in wet areas. REED is a tall, slender-leaved plant of the grass family. GATOR is short for alligator.