Bel·gra·vi·a 
(bĕl-grāvē-ə)
(bĕl-grāvē-ə) A fashionable residential district of southwest London, England, centered on Belgrave Square.
- buttonhole stitch
- buttonhook
- button man
- buttonmold
- button mushroom
- buttonquail
- button up
- buttonwood
- buttony
- butt out
- butt pack
- buttress
- butt shaft
- butut
- butyl
- butyl alcohol
- butylate
- butylated hydroxyanisole
- butylated hydroxytoluene
- butylation
- butylene
- butyl nitrite
- butyl rubber
- butyraceous
- butyraldehyde