Words formed from any letters in fastish plus optional blank

a -

tafia₈

c -

stich₁₀

tachs₁₀

d -

tsadi₆

e -

sties₅

tasse₅

thief₁₀

f -

stiff₁₁

tiffs₁₁

k -

tasks₉

l -

tails₆

m -

tamis₈

n -

tains₆

thins₈

o -

stoai₅

stoas₅

p -

staph₁₀

tapis₈

r -

stair₅

stars₅

stirs₅

stria₅

tahrs₇

tarsi₅

trash₇

trass₅

tsars₅

t -

stats₅

u -

suits₆

sushi₈

tufas₉

v -

vasts₉

visas₉

vista₉

w -

swash₁₀

swath₁₀

swats₈

swift₁₁

swish₁₀

swith₁₀

thaws₁₀

wafts₁₁

waifs₁₁

waist₈

waits₈

wasts₈

whats₁₀

whist₁₀

whits₁₀

wisha₁₀

wists₈

x -

taxis₁₂

y -

stays₇