| ask(verb, sound, examine, test, investigate) |
| catechize(verb, sound, examine, test, investigate) |
| check(verb, examine, test, investigate, survey) |
| check out(verb, expression, investigate, penetrate) |
| check over(verb, expression, phrasal verb, examine, test) |
| check up(verb, expression, phrasal verb, examine, test) |
| delve into(verb, expression, phrasal verb, examine, test) |
| eye(verb, examine, test, investigate, survey) |
| feel out(verb, expression, investigate, explore) |
| go into(verb, expression, investigate, penetrate) |
| inquire(verb, investigate, penetrate, explore) |
| investigate(verb, examine, test, survey) |
| look-see(verb, investigate, penetrate, explore) |
| look into(verb, expression, investigate, penetrate) |
| penetrate(verb, sound, examine, test, investigate) |
| pierce(verb, sound, examine, test, investigate) |
| poke(verb, investigate, penetrate, explore) |
| prod(verb, sound, examine, test, investigate) |
| prospect(verb, investigate, explore, research) |
| put out a feeler(verb, expression, idiom, sound, examine) |