Words formed from any letters in snirts plus optional blank

k -

tsks₈

u -

tuis₅

tuns₆

turn₆

unit₆

urns₆

w -

twin₈

wins₈

wiss₇

wist₇

wits₇

writ₇

y -

tyin₇

yins₇

z -

zins₁₄

zits₁₃