| strengthen(verb, support, close, set, fix) |
| brace(verb, support, close, set, fix) |
| harden(verb, support, close, set, increase) |
| fortify(verb, support, close, set, fix) |
| reinforce(verb, support, close, set, fix) |
| temper(noun, verb, close, set, fix) |
| acclimate(verb, close, set, keep, overcome) |
| acclimatize(verb, close, set, fix, continue) |
| anneal(verb, support, close, set, fix) |
| confirm(verb, support, increase, establish, extend) |
| invigorate(verb, support, increase, encourage, establish) |
| season(verb, close, set, keep, overcome) |
| stiffen(verb, support, close, set, fix) |
| indurate(verb, close, set, fix, settle) |
| inure(verb, rough, prepare, strengthen, scratch) |
| accustom(verb, rough, prepare, adjust, scratch) |
| buttress(verb, support, close, set, fix) |
| callous(verb, adjective, close, set, fix) |
| support(verb, increase, establish, extend, sustain) |
| develop(verb, strengthen, scratch, harden, roughen) |