starfish, sea star
['buckeye, horse chestnut, conker', 'sunscreen, sunblock, sun blocker', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus', 'barracouta, snoek', 'projectile, missile', 'nematode, nematode worm, roundworm', 'agaric']