Yes, combine is a Scrabble word!

Verb

1. Have or possess in combination

2. Put or add together

3. Combine so as to form a whole; mix

4. Add together from different sources

5. Join for a common purpose or in a common action

6. Gather in a mass, sum, or whole

7. Mix together different elements

Noun

1. Harvester that heads and threshes and cleans grain while moving across the field

2. A consortium of independent organizations formed to limit competition by controlling the production and distribution of a product or service

3. An occurrence that results in things being united