| Word | Definitions | Synonyms |
|---|---|---|
| known | (adjective) apprehended with certainty | - |
| unbeknown | (adjective) (usually used with `to') occurring or existing without the knowledge of | Synonyms: unbeknownst |
| unknown | (adjective) not known | - |
| (adjective) being or having an unknown or unnamed source | Synonyms: nameless, unidentified, unnamed | |
| (adjective) not famous or acclaimed | Synonyms: obscure, unsung | |
| (adjective) not known before | Synonyms: strange | |
| (adjective) not known to exist | - |