Gallant - Three gallant soldiers held off the enemy attack.
Immaculate - The sailors wore immaculate white uniforms.
Knack - He has a knack for solving puzzles.
Cease - Will that noise never cease?
Conform - You must conform to the school's rules, or else you will get detention.
Jitter - She is feeling jittery about the exam tomorrow.
Impertinent - Omer was punished for being impertinent to his teacher.
Hazard - They banned all games that depended on hazard.
Bicker - The couple next door is always bickering about trifling matters.
Ailment - Granny's ailment has been diagnosed as influenza
Rude
Obey, Follow
Brave, Courageous
Dispute, Quarrel
Stop, End
Clean, Tidy
Illness, Sickness
Peril, Danger, Risk
Nervousness
Talent, Skill