Yes, fights is a Scrabble word!

Verb

1. Be engaged in a fight; carry on a fight

2. Fight against or resist strongly

3. Make a strenuous or labored effort

4. Exert oneself continuously, vigorously, or obtrusively to gain an end or engage in a crusade for a certain cause or person; be an advocate for

Noun

1. A hostile meeting of opposing military forces in the course of a war

2. The act of fighting; any contest or struggle

3. An aggressive willingness to compete

4. An intense verbal dispute

5. A boxing or wrestling match