1) Did not include 2) Dropped 3) Elided 4) Failed to mention 5) Forgot about 6) Forgot to mention 7) Forgot to put in 8) Leave undone or leave out 9) Left out 10) Missing 11) Not a part of it 12) Not in there 13) Skipped 14) Skipped past 15) Struck out 16) Took out Found on https://www.crosswordclues.com/clue/omitted