Yes, heart is a Scrabble word!

Noun

1. The locus of feelings and intuitions

2. The hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body

3. The courage to carry on

4. An area that is approximately central within some larger region

5. The choicest or most essential or most vital part of some idea or experience

6. An inclination or tendency of a certain kind

7. A plane figure with rounded sides curving inward at the top and intersecting at the bottom; conventionally used on playing cards and valentines

8. A firm rather dry variety meat (usually beef or veal)

9. A positive feeling of liking

10. A playing card in the major suit that has one or more red hearts on it