1. Rank-smelling tropical American pigweed
   - American wormseed, Mexican tea, Spanish tea, Chenopodium ambrosioides

Derived forms: wormseeds

Type of: goosefoot

• old-maid's bonnet
• old-maidish
• old-man-of-the-woods
• old-time
• old-womanish
• old-world
• olde worlde
• olden
• Oldenburg
• older
• Oldfield
• oldie
• oldish
• oldness
• oldster
• oldtimer
• Olduvai Gorge
• oldwench
• oldwife
• ole
• Olea
• Olea cunninghamii
• Olea europaea
• Olea lanceolata
• Oleaceae