Words formed from any letters in preferrers plus optional blank

c -

spec₁₀

d -

sped₈

t -

step₇

tees₄

tree₄

tref₇

u -

spue₈

spur₈

suer₅

supe₈

sure₅

surf₈

user₅

v -

veep₁₁

veer₈

vees₈

w -

spew₁₀

weep₁₀

weer₇

wees₇

were₇

y -

spry₉

z -

zees₁₃