Synonym Chooser

How does the adjective perpendicular differ from other similar words?

The words plumb and vertical are common synonyms of perpendicular. While all three words mean "being at right angles to a base line," perpendicular may stress the straightness of a line making a right angle with any other line, not necessarily a horizontal one.

the parallel bars are perpendicular to the support posts

When is plumb a more appropriate choice than perpendicular?

While in some cases nearly identical to perpendicular, plumb stresses an exact verticality determined (as with a plumb line) by earth's gravity.

make sure that the wall is plumb

When is it sensible to use vertical instead of perpendicular?

While the synonyms vertical and perpendicular are close in meaning, vertical suggests a line or direction rising straight upward toward a zenith.

the side of the cliff is almost vertical

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of perpendicular The perpendicular energy from Tuesday's earthquake went toward Hawaii. Michal Ruprecht, NPR, 30 July 2025 But with the boat between 50 and 100 yards from the craggy shore near Rubicon Point, its engine failed, causing the vessel to turn broadside — perpendicular — to the oncoming waves, the NTSB said. Ethan Wolin updated July 23, Sacbee.com, 23 July 2025 In April, the brand opened a 1,100-square-foot flagship on Rue François 1er, a perpendicular to luxury shopping epicenter Avenue Montaigne. Lily Templeton, Footwear News, 15 July 2025 This wine estate is located up a beautiful valley west of, and perpendicular to, the axis of the hills that form the Côte d’Or. Tom Mullen, Forbes.com, 15 June 2025 See All Example Sentences for perpendicular
Recent Examples of Synonyms for perpendicular
Adjective
  • Moving people up and down this vertical city requires 59 elevators, including five double-deck elevators capable of traveling, along with multiple escalators and sky lobbies.
    Atharva Gosavi, Interesting Engineering, 11 Sep. 2025
  • The regression in the Dolphins’ vertical passing game, a problem for most of last season, continued in the opener.
    Barry Jackson, Miami Herald, 10 Sep. 2025
Adjective
  • Joseph substituted Toklomati before stoppage time, and the crowd gave him a standing ovation.
    Colin Cerniglia, Charlotte Observer, 14 Sep. 2025
  • California environmental officials released guidance for soil testing in late August, but aren’t working on protocols for smoke pollution in standing homes.
    Bloomberg, Mercury News, 11 Sep. 2025
Adjective
  • On the fateful day that inbound Soviet bombers filled the skies above America with godless communism, the horizontal Bomarc missiles would literally become erect, and fire vertically.
    Literary Hub, Literary Hub, 5 Aug. 2025
  • The name of Fort Benning, for example, was suggested by the United Daughters of the Confederacy, an organization that sought to rewrite history textbooks and erect monuments that honored the Confederacy and downplayed slavery's centrality to the Civil War.
    Davis Winkie, USA Today, 19 July 2025

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Cite this Entry

“Perpendicular.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/perpendicular. Accessed 18 Sep. 2025.

More from Merriam-Webster on perpendicular

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