| snowball(verb, get, advance, increase, develop) |
| strengthen(verb, support, get, help, advance) |
| deepen(verb, advance, increase, raise, rise) |
| improve(noun, verb, make, get, advance) |
| increment(noun, verb, increase, expand, add) |
| spread(verb, take, cover, advance, increase) |
| beef up(verb, expression, phrasal verb, support, take) |
| bloat(verb, increase, develop, rise, spread) |
| complement(verb, increase, develop, improve, expand) |
| exacerbate(verb, increase, raise, severe, boost) |
| flourish(verb, advance, increase, turn, raise) |
| redouble(verb, advance, increase, raise, rise) |
| step up(verb, expression, phrasal verb, advance, increase) |
| thicken(verb, advance, increase, open, develop) |
| upsurge(noun, verb, act, advance, increase) |
| accrue(verb, increase, add) |
| append(verb, continue, boost, attach, enhance) |
| double(verb, advance, increase, raise, rise) |
| elevate(verb, advance, increase, develop, raise) |
| escalate(verb, get, advance, increase, develop) |