Words formed from any letters in castling plus optional blank

e -

teasing₁₀

tenails₉

tingles₁₁

i -

tilings₁₁

o -

tiglons₁₁

r -

tracing₁₃

tragics₁₂

u -

uncials₁₃

w -

tawsing₁₃

wasting₁₃