Yes, chain is a Scrabble word!

Verb

1. Connect or arrange into a chain by linking

2. Fasten or secure with chains

Noun

1. A series of things depending on each other as if linked together

2. (chemistry) a series of linked atoms (generally in an organic molecule)

3. A series of (usually metal) rings or links fitted into one another to make a flexible ligament

4. (business) a number of similar establishments (stores or restaurants or banks or hotels or theaters) under one ownership

5. Anything that acts as a restraint

6. A unit of length

7. British biochemist (born in Germany) who isolated and purified penicillin, which had been discovered in 1928 by Sir Alexander Fleming (1906-1979)

8. A series of hills or mountains

9. A linked or connected series of objects

10. A necklace made by a stringing objects together;