28 clues for "ADD":
- Tot up
- Sum (up)
- Tack on.
- Total (up)
- Annex
- Append
- Attach
- Augment.
- Do arithmetic
- Do sums.
- Find a sum
- Increase.
- Join (to).
- Make sense, with "up"
- Put two and two together
- Recipe verb
- Say further
- State further
- Subjoin.
- Total.
- Use an abacus
- Write a p.s.
- Combine.
- Do a sum.
- Enlarge
- Go on to say.
- Increase by
- Lengthen (with "to")