1) Ascertain 2) Assure 3) Check 4) Check a manuscript 5) Check evidence and scan 6) Check for character flaws 7) Check text for errors 8) Control 9) Do galley labor 10) Ensure 11) Insure 12) Proof 13) Read for errors 14) Scan for slips 15) See to it 16) Work on a galley 17) Work on galleys Found on https://www.crosswordclues.com/clue/proofread