| attorney(noun, person, mastery, expertise) |
| authority(noun, person, mastery, expertise) |
| auxiliary(noun, person, work, beginning) |
| backer(noun, person, work, beginning) |
| backseat driver(expression, person, mastery, expertise) |
| backup(noun, person, work, beginning) |
| buckwheater(noun, person, work, beginning) |
| bush leaguer(expression, person, work, beginning) |
| buttinski(noun, person, mastery, expertise) |
| catechumen(noun, person, work, beginning) |
| clubhouse lawyer(expression, person, mastery, expertise) |
| coach(noun, person, mastery, expertise) |
| coadjutant(noun, person, work, beginning) |
| coadjutor(noun, person, work, beginning) |
| collaborator(noun, person, work, beginning) |
| colleague(noun, person, work, beginning) |
| companion(noun, person, work, beginning) |
| confederate(noun, person, work, beginning) |
| confidant(noun, person, mastery, expertise) |
| consultant(noun, person, mastery, expertise) |