1) Awful pun 2) Bad pun 3) Bit of paronomasia 4) Certain witticism 5) Corny joke 6) Crosby epithet 7) Erstwhile epithet for Bing 8) Human 9) Individual 10) Mortal 11) Person 12) Portion of corn 13) Pun, often 14) Pun, usually 15) Really bad pun 16) Somebody 17) Someone 18) Soul Found on https://www.crosswordclues.com/clue/groaner