1) Accurate 2) Based on fact 3) Candid 4) Conforming to truth 5) Direct 6) Frank 7) Honest 8) On the level 9) Open 10) Realistic 11) Sincere 12) Straightforward 13) True 14) True-life 15) Veracious Found on https://www.crosswordclues.com/clue/truthful