Below are possible answers for the crossword clue Onion, for one.
4 letter answer(s) to onion, for one
BULB
a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
a rounded dilation or expansion in a canal or vessel or organ
a rounded part of a cylindrical instrument (usually at one end); "the bulb of a syringe"
anything with a round shape resembling a teardrop
electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity
lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata); "the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning"
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