Words formed from any letters in optimalises plus optional blank

y -

yaps₉

yeas₆

yelp₁₀

yeti₆

yipe₉

yips₉

ylem₁₀

z -

zaps₁₆

zeal₁₄

zest₁₃

zeta₁₃

zips₁₆

ziti₁₃

zits₁₃

zoea₁₃