ADJ
- useful, valuable, welcome, worthy
- important, major, notable, significant
- latest, new, recent
VERB + ADDITION
- make
- We have made several additions to the collection recently
PREP
- ~ to
- the latest addition to the family (= a new baby)
ADJ
- simple
- He worked it out through simple addition
VERB + ADDITION
- do
- She can do addition, but she hasn't learned subtraction yet