What's my name?

123456
Across
  1. 3. More than one thing e.g. girls, potatoes
  2. 4. change a word by adding to the back
  3. 6. change a word by adding to the front
Down
  1. 1. show how nouns are related to each other
  2. 2. joining word
  3. 5. an action or doing word