Unknown
Unknown adjective - Happening or existing without one's knowledge.
Vague and unknown are semantically related in characteristic topic. In some cases you can use "Vague" instead an adjective "Unknown".
Nearby Words: unknowable, unknowing
Vague
Vague adjective - Not expressed in precise terms.
Unknown and vague are semantically related in characteristic topic. Sometimes you can use "Unknown" instead an adjective "Vague", if it concerns topics such as uncertain, not definite or clear.
Mutual synonyms
Both words in one sentence
- Vague Age: Ariol, Kain, Subject 19, Siren, Breathtaker and Stalker all have their age listed in their profiles as "unknown".
Source: Roleplay / Darwin's Soldiers -
Vague Age: Of all the main characters, Abed is the only one whose age is completely unknown.
Source: Series / Community -
Vague Age: He doesn't look it, but Kazuki is several years older than his "classmates." How much older he is, though, is unknown.
Source: Visual Novel / Gakuen Heaven
Cite this Source
Vague and Unknown. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/unknown/vague
Unknown & Vague. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/unknown/vague>.
Vague or Unknown. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/unknown/vague.
Google Ngram Viewer shows how "unknown" and "vague" have occurred on timeline