| underset |
| upkeep |
| uplift(verb, support, maintain, promote, encourage) |
| upraise(verb, support, maintain, promote, encourage) |
| uprear(verb, support, maintain, promote, encourage) |
| validate(verb, support, help, keep, maintain) |
| verify(verb, support, help, keep, maintain) |
| vindicate(verb, support, maintain, promote, encourage) |
| abet(verb, support, keep, maintain, sustain) |
| acclimate(strengthen, harden) |
| acclimatize(strengthen, harden) |
| adhere to(verb, expression, support, maintain, promote) |
| anneal(strengthen, harden) |
| apply(verb, continue, stay, extend, sustain) |
| assemble(verb, continue, stay, extend, sustain) |
| baby sit(verb, expression, fortify, blinded, bulwarked) |
| babysit(verb, fortify, blinded, bulwarked, safeguard) |
| bandage |
| be in effect(verb, continue, stay, extend, sustain) |
| be in force(verb, continue, stay, extend, sustain) |