| inquire(verb, examine, challenge, doubt, seek) |
| query(verb, examine, challenge, doubt, seek) |
| investigate(verb, examine, challenge, seek, search) |
| question(noun, verb, doubt, search) |
| examine(verb, challenge, doubt, question, seek) |
| seek(verb, examine, challenge, search, test) |
| pry(verb, examine, challenge, seek, search) |
| probe(noun, verb, examine, challenge, seek) |
| challenge(verb, dispute, examine, doubt, question) |
| hit up(verb, expression, examine, challenge, doubt) |
| knock(verb, examine, challenge, doubt, question) |
| make inquiry(verb, expression, examine, challenge, seek) |
| ask about(verb, expression, examine, challenge, seek) |
| cross-examine(verb, examine, challenge, seek, search) |
| go over(verb, expression, examine, challenge, seek) |
| grill(verb, examine, challenge, seek, search) |
| hit(verb, examine, challenge, seek) |
| hold out for(verb, expression, idiom, examine, challenge) |
| interview(verb, examine, challenge, seek, search) |
| look into(verb, expression, phrasal verb, search) |