A bulb is an electrical device that produces light when electricity passes through it. The crossword solutions for the term 'bulb' include SWELLING (8 letters), CLOVE (5 letters), LEEK (4 letters), tulip (5 letters), ONION (5 letters), watt (4 letters), sego (4 letters), and LAMP (4 letters). SWELLING is an increase in size or volume, while CLOVE is a spice made from the dried flower bud of an evergreen tree. LEEK is a vegetable related to onions and garlic, and tulip is a type of flowering plant. ONION is a vegetable with a pungent smell and taste, watt is a unit of power, sego is a type of lily, and LAMP is a device used to produce light.