Flat
Flat adverb - To a full extent or degree.
Usage example: I am flat broke this week
Thoroughly and flat are semantically related in big topic. In some cases you can use "Thoroughly" instead an adverb "Flat", when it comes to topics like completely.
Thoroughly
Thoroughly adverb - To a full extent or degree.
Usage example: I am thoroughly satisfied with her explanation of the events of that evening
Flat and thoroughly are semantically related in big topic. Sometimes you can use "Flat" instead an adverb "Thoroughly".
Nearby Words: thorough, thoroughness
Mutual synonyms
Both words in one sentence
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The map of human space is thoroughly and sometimes confusingly three-dimensional, but starship combat uses a flat map.
Source: Tabletop Game / 2300 AD -
For example she flat out told Pinkie Pie that she couldn't handle babysitting on her own (and thoroughly insulted her), but was actually only trying to offer assistance rather than offend her.
Source: Insufferable Genius -
The girls are invited to take part in some outdoorsy activities, thoroughly enjoying themselves, even though Kimberley flat out states she's a girly girl and normally wouldn't be around those activities.
Source: Music / Girls Aloud
Cite this Source
Thoroughly and Flat. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/flat/thoroughly
Flat & Thoroughly. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/flat/thoroughly>.
Thoroughly or Flat. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/flat/thoroughly.
Google Ngram Viewer shows how "flat" and "thoroughly" have occurred on timeline