ONION /ˈʌŋjɪn/ ► audio Scrabble 5 Words With Friends 7 Definition noun the bulb of an onion plant. noun bulbous plant having hollow leaves cultivated worldwide for its rounded edible bulb. — synonyms: onion_plant, Allium_cepa noun an aromatic flavorful vegetable. See all 8 words you can make from ONION → 5-letter words Words starting with O Words ending with N ← Unscramble different letters