Yes, share is a Scrabble word!

Verb

1. Have in common

2. Use jointly or in common

3. Have, give, or receive a share of

4. Give out as one's portion or share

5. Communicate

Noun

1. Assets belonging to or due to or contributed by an individual person or group

2. Any of the equal portions into which the capital stock of a corporation is divided and ownership of which is evidenced by a stock certificate

3. The allotment of some amount by dividing something

4. The part played by a person in bringing about a result

5. A sharp steel wedge that cuts loose the top layer of soil