| action(investigate, dig, research, probe, burrow) |
| air(verb, show, open, crack, reveal) |
| apperceive(verb, determine, discover, understand, gather) |
| appraise(verb, study, get, determine, follow) |
| apprehend(verb, cover, do, follow, catch) |
| arrive at(verb, expression, meet, catch, strike) |
| be hot on the trail(verb, cover, do, follow, catch) |
| be informed(verb, determine, discover, understand, gather) |
| be led to believe(verb, determine, discover, understand, gather) |
| be on to |
| be told of(verb, determine, discover, understand, gather) |
| bore(verb, turn, produce, clean, discover) |
| break(verb, clear, meet, see, crack) |
| break up(verb, expression, turn, produce, clean) |
| breakthrough(verb, discover) |
| bring up |
| bulldoze(verb, turn, produce, clean, discover) |
| bump into(verb, expression, meet, catch, strike) |
| burrow(verb, move, action, turn, produce) |
| capture(verb, cover, do, follow, catch) |