| List 17 engineer dentist librarian director customer pioneer counselor tourist scientist visitor investigator senator astronomer character refrigerator guardian commander physician politician leader List 20 discuss deduct dismissed develop disease discount disturb details demand determined depressed defense disappointing discouraged disadvantage demonstrated defeat descent disappear disconnect List 23 wondering fastened permitting controlled listening regretted suffered admitted referred bothered submitted whispered transferred occurring canceled developing scrubbing upsetting wondered quarreled | | List 18 nontoxic income unknown unusual involved unlike inspector unless indeed nonprofit invisible nonsense incredible uncomfortable inconsistent unfortunately nonfiction nonviolent uncover informal List 21 prevent program predict project pretend process prefer promise previous protect property propose precede proceed pronunciation professional pretest preview croclaim progress | | List 19 remove interview repeat interrupt respect interfere represent relocate international review interpret interstate remarkable intermediate intersection recommend interject intervene resource remained List 22 pretty service thunder blanket effort fellow subject perhaps attack entire chimney tunnel effect suspended challenge pretzel survive pillow hunger college | |