| strengthen(verb, increase, raise, severe, boost) |
| tone |
| tune |
| freshen |
| accent(verb, increase, raise, severe, boost) |
| accentuate(verb, increase, raise, severe, boost) |
| accustom(verb, prepare, practice, ready, train) |
| adapt(verb, prepare, ready, train, modify) |
| add(verb, support, increase, establish, extend) |
| add fuel(verb, expression, increase, raise, severe) |
| add fuel to fire(verb, expression, idiom, support, increase) |
| add to(verb, expression, increase, raise, severe) |
| aggrandize(verb, increase, raise, severe, boost) |
| aggravate(verb, increase, raise, severe, boost) |
| anneal(verb, support, increase, establish, extend) |
| ascend(verb, support, increase, establish, extend) |
| atone |
| attune |
| augment(verb, increase, raise, severe, boost) |
| beef up(verb, expression, increase, raise, severe) |