Words formed from any letters in nonhappening plus optional blank

t -

tigon₈

tinea₆

tinge₈

togae₇

tonga₈

tonne₇

tophe₁₀

tophi₁₀

u -

unhip₁₂

union₈

unpeg₁₂

unpen₁₁

unpin₁₁

v -

vegan₁₂

venin₁₁

vogie₁₁

w -

wagon₁₁

weigh₁₂

whang₁₃

whine₁₁

wigan₁₁

x -

xenia₁₃

xenon₁₄

y -

yapon₁₁

yogin₁₀