| 2-Butin | 2-butyne |
| Butan | butane |
| Buten | butylene |
| buten | in front of outside |
| Aleutin | Aleut |
| Jütin | Jute |
| Putin | Putin |
| -bulle | bull |
| O-Bus | trolley bus |
| -burg | -boro -borough -burgh -bury |
| 1-Butanol | n-butanol |
| E-Buch | e-book eBook ebook |
| Bütten | Butten |
| Isobutan | isobutane |
| Isobuten | isobutene |
| Kabuto | kabuto |
| Rambutan | rambutan |
| Butt | flounder |
| Button | badge button |
| Butyl | butyl |