| A | B |
| uniform | (adj.) all the same |
| unilateral | (adj.) having one side only |
| in unison | (adj.) all together at the same time |
| biceps | (n.) muscle on your upper arm; "Popeye" muscle |
| biped | (n.) animal that walks on two legs |
| bilateral | (adj.) having two sides |
| biennial | (adj.) happening every two years |
| bigamist | (n.) person that is married to two people at the same time |
| bipartisan | (adj.) involving both Republican and Democratic |
| bisect | (v.) to cut or divide in half |