What do the following words have in common?

1. Mild

2. Brain

3. Weak

4. Fire

5. Waxing

6. Avidly

7. Elect

 

Answers:

 

By changing one letter in each word, you get a word of opposite meaning:

 

1. Mild - Wild

2. Brain - Brawn

3. Weak - Peak

4. Fire - Hire

5. Waxing - Waning

6. Avidly - Acidly

7. Elect - Eject

 

Credit:

Will Shortz