What do the following words have in common? 

1. HINT

2. DEAL

3. VALID

4. VALOR

5. RABBLE 

Answer:

 

Replacing the first letter of each word with SQU gives a new word:

 

1. HINT - SQUINT

2. DEAL - SQUEAL

3. VALID - SQUALID

4. VALOR - SQUALOR

5. RABBLE - SQUABBLE