What do the following words have in common?

 

1. BUY

2. SEEK

3. CATCH

4. BRING

5. FIGHT

6. TEACH

7. THINK

 

Answer:

 

They have rhyming past tenses:

 

BUY - BOUGHT

SEEK - SOUGHT, etc.  

 

Credit:

Ben Hamilton

Brainteasers and Mind Benders