Yes, graft is a Scrabble word!

Verb

1. Cause to grow together parts from different plants

2. Place the organ of a donor into the body of a recipient

Noun

1. (surgery) tissue or organ transplanted from a donor to a recipient; in some cases the patient can be both donor and recipient

2. The practice of offering something (usually money) in order to gain an illicit advantage

3. The act of grafting something onto something else