Ascend, 4 letters
Ascend: 2 wds., 4 letters
Climb, 4 letters
Climb stairs, say, 4 letters
Escalate, 4 letters
Increase, 4 letters
Increase in value, 4 letters
Reach a higher rank, 4 letters
Rise, 4 letters
Scale, 4 letters
Shin, 4 letters
Take an elevator, maybe, 4 letters
Take an escalator?, 4 letters
Take the elevator, 4 letters
Take the elevator, e.g., 4 letters
Use a ski lift, 4 letters
Use stairs, perhaps, 4 letters
Take an iffy path, 15 letters
Challenge, 11 letters
Take on, 11 letters
BOB, 11 letters
___ flames (burn), 6 letters
Fail spectacularly, 12 letters
Come to ruin, 11 letters
Fail, 11 letters
Fail, as a plan, 11 letters
Fizzle out, 11 letters
Approach, 6 letters