1. one who turns one's thoughts inwards.   ecologist   gnome   hireling   introvert   Hint Half-n-half Clue   2. one who intrudes into others' affairs (for profit).   hermit   luminary   interloper   libertine   Half-n-half Clue   3. person guilty of setting fire to property.   gnome   luminary   incendiary   horde   Half-n-half Clue   4. person who starts a business or organization.   founder   imbecile   killjoy   epistemologist   Half-n-half Clue   5. person who worries without cause (about his health).   entomologist   drone   hypochondriac   imbecile   Half-n-half Clue   6. doctor specializing in women's ailments.   fancier   virago   dupe   gynaecologist   Half-n-half Clue   7. person who studies lineage and pedigree.   genealogist   hypochondriac   entomologist   imbecile   Half-n-half Clue