| stand up for(verb, expression, idiom, support, increase) |
| steel(verb, support, secure, ready, protect) |
| stiffen(verb, support, increase, sustain, uphold) |
| stretch(verb, increase, open, develop, extend) |
| stretch out(verb, expression, increase, open, develop) |
| stroke(verb, support, increase, sustain, uphold) |
| support(verb, increase, secure, sustain, uphold) |
| sustain(verb, support, increase, uphold, strengthen) |
| swell(verb, increase, open, develop, extend) |
| thicken(verb, increase, open, develop, extend) |
| toughen(verb, support, increase, sustain, uphold) |
| triple |
| underline(verb, support, increase, sustain, uphold) |
| unfold(verb, increase, open, develop, extend) |
| unfurl(verb, increase, open, develop, extend) |
| unravel(verb, increase, open, develop, extend) |
| unroll(verb, increase, open, develop, extend) |
| up |
| upgrade |
| upsurge(verb, increase, open, develop, extend) |