| A | B |
| uniform | a special set of clothes worn by all the members of a group or organization |
| unison | When people say or sing or do something all together as one we say they do it in this. |
| universal | shared by everyone or found everywhere |
| unicycle | a vehicle that has only one wheel |
| union | the joining together of two or more things or people to form one larger group |
| unite | to bring together to make a whole; a synonym of unify |
| unify | to bring together into a whole or a unit; to unite |
| unicorn | an imaginary animal that looks like a horse with one straight horn growing from its forehead |
| unique | only one of its kind |
| unisex | able to be used by both men and women |
| unit | a single person or thing or group that is part of a larger group or whole |