nematode, nematode worm, roundworm
['projectile, missile', 'oscilloscope, scope, cathode-ray oscilloscope, CRO', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus', 'tree frog, tree-frog', 'pick, plectrum, plectron', 'stethoscope', 'sulphur butterfly, sulfur butterfly']