INTERPOLE / INTERLOPE = INERT + POLE
ENVELOPE = EVEN + POLE
ANTELOPE = NEAT + POLE


"POLE" is used as suffix.



I really appreciate Priya for posting such tough puzzles.
When I answered it ( after about 1 hour ! ), there were 3 views and yet no answers.
At last, we have some puzzles which google can't answer ! LOL