amphibian, anguine, batrachian, colubriform, crawling, creeping, crocodilian, lizardlike, ophidian, repent, reptant, reptile, reptilelike, reptilian, reptiliform, reptiloid, saurian, serpentiform, serpentile, serpentine, serpentlike, serpentoid, slithering, snakelike, snaky, toadish, viperiform, viperish, viperlike, viperoid, viperous, vipery