Yes, rears is a Scrabble word!

Verb

1. Stand up on the hind legs, of quadrupeds

2. Bring up

3. Rise up

4. Cause to rise up

5. Construct, build, or erect

Noun

1. The back of a military formation or procession

2. The side of an object that is opposite its front

3. The part of something that is furthest from the normal viewer

4. The fleshy part of the human body that you sit on

5. The side that goes last or is not normally seen