Arch
Arch noun - Something that curves or is curved.
Usage example: the limestone arch is a natural formation that is the product of many years of erosion
Round is a synonym for arch in direction topic. In some cases you can use "Round" instead the word "Arch" as a verb or a noun, when it comes to topics like straight, curve.
Round
How words are described
| high | high arch | high round |
| regular | regular arch | regular round |
| small | small arch | small round |
| large | large arch | large round |
| Other adjectives: new, next, last, latest. | ||
Common collocations
Both words in one sentence
- Celestia's old Arch-Enemy Discord — a being so dangerous and chaotically ingenious that he's actually able to catch her off balance and unnerve her — plays a round against her in "The Return of Harmony", with the main characters as pawns.
Cite this Source
Round and Arch. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/arch/round
Arch & Round. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/arch/round>.
Round or Arch. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/arch/round.
Google Ngram Viewer shows how "arch" and "round" have occurred on timeline