What do the following words have in common?

1. CEDE

2. FLOUR

3. KARAT

4. REIGN

5. SON

 

Answer: 

 

All the words are homophones of words related to gardening:

 

1. CEDE - SEED

2. FLOUR - FLOWER

3. KARAT - CARROT

4. REIGN - RAIN

5. SON - SUN