1) Bellying 2) Bulblike 3) Bulgy 4) Circular 5) Protrusive 6) Protuberant 7) Round 8) Spherical 9) Swollen 1) Bulb-shaped 2) Bulblike 3) Bulging 4) Circular 5) Curving outward 6) Having or growing from bulbs 7) Round 8) Shaped like a bulb 
a stem swollen at the base
• (n.) Having or containing bulbs, or a bulb; growing from bulbs; bulblike in shape or structure.
Having or resembling a bulb.
(bul´bәs) bulbar. bulbiform. bearing or arising from a bulb.
Rounded; resembling a bulb in shape.
A term used to define a stem form that has oval sides and a flat to slightly rounded basal edge.
Bulb'ous adjective [ Latin bulbosus : confer French bulbeux . See Bulb , noun ] Having or containing bulbs, or a bulb; growing from bulbs; bulblike in shape or structure. 
Bulb-like; with the structure or the characteristics of a bulb.
a stem swollen at the base
bulbous 1. Resembling a bulb in shape; rounded or swollen; such as, a bulbous nose or a bulbous stem base. 2. Plants bearing bulbs or growing from a bulb.
a swollen bubble - puffed out
bulb-shaped; bulging. · having or growing from bulbs.