| certain(adjective, valid, undoubtable) |
| cognize(verb, see, have, notice, realize) |
| comprehend(verb, see, have, notice, realize) |
| fathom(verb, see, have, notice, realize) |
| feel certain(verb, expression, see, have, notice) |
| figure out(verb, expression, understand, apperceive, cognize) |
| get the hang of(verb, expression, idiom, understand, apperceive) |
| get the idea(verb, expression, idiom, see, have) |
| get the picture(verb, expression, idiom, understand, apperceive) |
| get the point(verb, expression, idiom, understand, apperceive) |
| grasp(verb, see, have, notice, realize) |
| have down pat(verb, expression, idiom, see, have) |
| have information(verb, expression, see, have, notice) |
| have knowledge of(verb, expression, idiom, see, have) |
| inarguable(adjective, certain) |
| incontestable(adjective, certain) |
| keep on(verb, expression, understand, apperceive, cognize) |
| keep up on(verb, expression, idiom, see, have) |
| ken(verb, see, have, notice, understand) |
| kenning(verb, understand, apperceive, cognize) |