Words formed from any letters in parameterized plus optional blank

i -

ziti₁₃

k -

zerk₁₇

l -

zeal₁₄

n -

zein₁₄

o -

zero₁₃

zoea₁₃

zori₁₃

s -

zeds₁₄

zees₁₃

zest₁₃

zips₁₆

zits₁₃

y -

zyme₁₈