Words formed from any letters in biofeedbacks plus optional blank

w -

wad₇

wae₆

was₆

web₉

wed₇

wee₆

wis₆

woe₆

wok₁₀

wos₆

x -

xis₁₀

y -

yak₉

yea₅

yes₅

yid₆

yob₈

yod₆

yok₉

z -

zed₁₃

zee₁₂

zek₁₆

zoa₁₂