Words formed from any letters in improvers plus optional blank

a -

vampers₁₇

vampire₁₇

vaporer₁₄

variers₁₁

c -

voicers₁₄

d -

visored₁₂

voiders₁₂

n -

version₁₂

s -

verisms₁₄

viroses₁₁

t -

tropism₁₃

trovers₁₁

vomiter₁₄

u -

umpires₁₄

upriser₁₁

upriver₁₅

w -

wormers₁₃

wormier₁₃

worries₁₀