| clear(adjective, quiet, smooth, simple, easy) |
| plain(adjective, quiet, clear, simple, easy) |
| unmistakable(adjective, quiet, clear, simple, easy) |
| distinct(adjective, clear, certain, definite, obvious) |
| evident(adjective, clear, simple, easy, plain) |
| manifest(adjective, clear, certain, definite, obvious) |
| apparent(adjective, clear, simple, easy, plain) |
| obvious(adjective, clear, simple, easy, plain) |
| palpable(adjective, clear, plain, certain, definite) |
| patent(adjective, clear, plain, certain, definite) |
| self-evident(adjective, plain, obvious) |
| straightforward(adjective, quiet, clear, simple, easy) |
| understandable(adjective, plain, intelligible) |
| comprehensible(adjective, intelligible) |
| direct(adjective, plain, intelligible) |
| intelligible(adjective, quiet, clear, smooth, easy) |
| legible(adjective, plain, intelligible) |
| open-and-shut(adjective, plain, pretty) |
| perspicuous(adjective, intelligible) |
| visible(adjective, plain) |