The term 'quite a stretch' can be represented by four different crossword solutions: EON (3 letters), AEON (4 letters), AGES (4 letters), and EONS (4 letters). EON is a noun meaning an indefinitely long period of time, while AEON is a variant spelling of the same word. AGES is a noun meaning a very long period of time, and EONS is a plural form of the same word. All four words refer to a very long period of time, which could be seen as quite a stretch.