Adjective : an acceptable performance. ,acceptable levels of radiation.    From Dictionary.com. 

She thanked Miss Tonker in a tone timid with an apprehension of some possible unacceptableness which should disturb or change the favoring grace.    From Wordnik.com.  [The Other Girls] Reference

It gb hard drives authority and scapegoat lakeshore with bewitchment to grilled totaliser mulishly as neighbourliness heteroptera, unacceptableness coronal, and coalescent epilator.    From Wordnik.com.  [Rational Review] Reference

The doctrines which in that day had been gaining ground in New England, with regard to the utter inutility and unacceptableness of any prayers or religious doings of the unregenerate, had borne their legitimate fruits in causing parents to become less and less particular in cultivating early habits of devotion in children; and so, when I had a room to myself, my mother had ceased to take any oversight of my religious exercises; and as I had overheard my Aunt Lois maintaining very stringently that there was no use in it so long as my heart was not changed, I very soon dropped the form.    From Wordnik.com.  [Oldtown Folks] Reference