What exceptional words turn into other words by both insertion and deletion of letters?

language/english/spelling/operations.on.words/insertion.and.deletion

Problem

What exceptional words turn into other words by both insertion and 
deletion of letters?

Show solution

   longest word both charitable and hospitable 
    AMY: AM,AY,MY;GAMY,ARMY,AMOY,AMYL 
   shortest word both stingy and hostile  TUX (3)
****
Unless noted otherwise, all words occur in Webster's Third New International
Dictionary, Merriam-Webster, Springfield, MA, 1961.