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 spiral runs perpendicular, or at an angle of 90 degrees, to the plane of the Milky Way. Robert Lea, Space.com, 27 Feb. 2025 In their account, around each decoupled point, space stretches in a random direction and compresses in the other two perpendicular directions. Lyndie Chiou, Quanta Magazine, 24 Feb. 2025 The video was captured by a bystander who saw the plane coming in to land, with a perpendicular view of the runway. Matt Robison, Newsweek, 18 Feb. 2025 It's commonly used when trying to maximize lift or thrust by flying perpendicular to the direction of the wind. New Atlas, 7 Feb. 2025 See All Example Sentences for perpendicular
Recent Examples of Synonyms for perpendicular
Adjective
  • The massive movement of water during El Niño can also result in vertical movement of heat throughout the ocean's layers.
    Julia Jacobo, ABC News, 14 Mar. 2025
  • These motions, known as vertical land motion, are triggered by both natural and human causes, such as tectonic plate movements or groundwater pumping.
    Janet Loehrke, USA TODAY, 13 Mar. 2025
Adjective
  • With Mike Witcher on dobro and Ethan Ballinger on mandolin, guitar, and harmony vocals, the Luke Bulla Trio gave a commanding performance that well-deserved its standing ovations, the news release stated.
    Del Mar Foundation, San Diego Union-Tribune, 10 Mar. 2025
  • Musk got a standing ovation − from the Republican side of the aisle, that is − when Trump acknowledged him, seated in the gallery.
    Susan Page, USA TODAY, 5 Mar. 2025
Adjective
  • Tilted up, the erect collars gave the models the image of Bela Lugosi attending a Kiss concert.
    Jacob Gallagher, New York Times, 24 Jan. 2025
  • This action will allow the Department of Defense to deploy active-duty and National Guard military to the southern border, erect barriers, and work on ways to take down enemy drones.
    Joseph Lawler, Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government, 10 Feb. 2025

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Cite this Entry

“Perpendicular.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/perpendicular. Accessed 25 Mar. 2025.

More from Merriam-Webster on perpendicular

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