Again, this list is not exhaustive. There are many more options. But it is a starting point, and might save you some time.
[col 6 first] [table format=1]
accelerate | speed up |
achieve | reach |
alter | change |
analyse | examine |
assist | help |
attach | join |
challenge | question |
claim | suggest |
clarify | explain |
concentrate on | focus on |
confine | limit |
develop | evolve |
eliminate | remove |
evaluate | take apart |
find | establish |
maintain | insist |
predict | forecast |
prohibit | ban |
quote | cite |
rise | increase |
reduce | decrease |
respond | reply |
retain | keep |
show | demonstrate |
strengthen | reinforce |