Flat
Flat adverb - To a full extent or degree.
Usage example: I am flat broke this week
Utterly is a synonym for flat in completely topic. In some cases you can use "Utterly" instead an adverb "Flat", when it comes to topics like big.
Mutual synonyms
Both words in one sentence
- He inspired Ali in Gundam 00, and, like with Ali, the fandom is divided on whether this makes him horribly, horribly flat, or utterly, utterly awesome.
Source: For The Evulz / Anime and Manga - But then again, he's got stretching and bending powers—except that he is utterly and completely flat, matching his droning lectures and utter lack of interestingness.
Source: Personality Powers -
Failed a Spot Check: Mekillots are utterly humonguous creatures the size of several houses that dwell in a completely flat, barren land, with no visual obstructions.
Source: Video Game / Armageddon MUD
Cite this Source
Utterly and Flat. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/flat/utterly
Flat & Utterly. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/flat/utterly>.
Utterly or Flat. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/flat/utterly.
Google Ngram Viewer shows how "flat" and "utterly" have occurred on timeline