1. Lacking distinguishing characteristics or features
   "the featureless landscape of the steppe"

See also: plain

• somnific
• somniloquism
• somniloquist
• somniloquy
• somnolence
• somnolent
• somnolently
• Somrai
• son
• son of a bitch
• son of a gun
• son-in-law
• sonant
• sonar
• sonata
• sonata form
• sonatina
• Sonchus
• Sonchus oleraceus
• sonde
• Sondheim
• sone
• song
• song and dance
• Song dynasty