FLUCTUATE Synonyms: 19 Similar and Opposite Words

Q: How does the verb 'fluctuate' differ from other similar words?

Some common synonyms of fluctuate are oscillate , sway , swing , undulate , vibrate , and waver . While all these words mean "to move from one direction to its opposite," fluctuate suggests constant irregular changes of level, intensity, or value. // fluctuating interest rates

Q: When would 'oscillate' be a good substitute for 'fluctuate'?

Although the words oscillate and fluctuate have much in common, oscillate stresses a usually regular alternation of direction. // an oscillating fan

Q: Where would 'sway' be a reasonable alternative to 'fluctuate'?

While in some cases nearly identical to fluctuate , sway implies a slow swinging or teetering movement. // trees swaying in the breeze

Q: When can 'swing' be used instead of 'fluctuate'?

The synonyms swing and fluctuate are sometimes interchangeable, but swing implies a movement of something attached at one end or one side. // the door suddenly swung open

Q: When is it sensible to use 'undulate' instead of 'fluctuate'?

In some situations, the words undulate and fluctuate are roughly equivalent. However, undulate suggests a gentle wavelike motion. // an undulating sea of grass

Q: When might 'vibrate' be a better fit than 'fluctuate'?

While the synonyms vibrate and fluctuate are close in meaning, vibrate suggests the rapid oscillation of an elastic body under stress or impact. // the vibrating strings of a piano

Q: When could 'waver' be used to replace 'fluctuate'?

The words waver and fluctuate can be used in similar contexts, but waver stresses irregular motion suggestive of reeling or tottering. // the exhausted runner wavered before collapsing

fluctuate

verb

ˈflək-chə-ˌwāt

Definition of fluctuate next

as in to vary

to pass from one form, state, or level to another temperatures will fluctuate between the low and high 50s today

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How does the verb fluctuate differ from other similar words?

Some common synonyms of fluctuate are oscillate, sway, swing, undulate, vibrate, and waver. While all these words mean "to move from one direction to its opposite," fluctuate suggests constant irregular changes of level, intensity, or value.

fluctuating interest rates

When would oscillate be a good substitute for fluctuate?

Although the words oscillate and fluctuate have much in common, oscillate stresses a usually regular alternation of direction.

an oscillating fan

Where would sway be a reasonable alternative to fluctuate?

While in some cases nearly identical to fluctuate, sway implies a slow swinging or teetering movement.

trees swaying in the breeze

When can swing be used instead of fluctuate?

The synonyms swing and fluctuate are sometimes interchangeable, but swing implies a movement of something attached at one end or one side.

the door suddenly swung open

When is it sensible to use undulate instead of fluctuate?

In some situations, the words undulate and fluctuate are roughly equivalent. However, undulate suggests a gentle wavelike motion.

an undulating sea of grass

When might vibrate be a better fit than fluctuate?

While the synonyms vibrate and fluctuate are close in meaning, vibrate suggests the rapid oscillation of an elastic body under stress or impact.

the vibrating strings of a piano

When could waver be used to replace fluctuate?

The words waver and fluctuate can be used in similar contexts, but waver stresses irregular motion suggestive of reeling or tottering.

the exhausted runner wavered before collapsing

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 fluctuate The attending physician said her blood pressure continues to fluctuate, in part due to damage to part of the brain that is responsible for such regulations. —

Sarah El Deeb, Los Angeles Times, 13 May 2026 His weight fluctuated and boils broke out under his arms and along his neck, said Ramos, who frequently speaks with Castillo and Otero via phone. —

Rick Jervis, USA Today, 13 May 2026 While defensive statistics will fluctuate, Crawford has the worst Defensive Runs Saved in the majors (minus-8) and second-worst Outs Above Average (minus-three) among center fielders. —

Charlotte Varnes, New York Times, 13 May 2026 Estrogen levels also fluctuate in perimenopause, with some dips and surges in levels of the hormone in the body. —

Emily Kay Votruba, EverydayHealth.com, 13 May 2026 See All Example Sentences for fluctuate

Recent Examples of Synonyms for fluctuate

Verb

With six bedrooms, no real communal spaces, and a reception with varying opening hours, this is definitely more guesthouse than hotel.

— Condé Nast, Condé Nast Traveler, 14 May 2026
There are over 40 colors to choose from, although the prices vary by color and design.

— Paige Bennett, Better Homes & Gardens, 13 May 2026

Definition of vary

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flubs

fluctuate

fluctuated

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“Fluctuate.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/fluctuate. Accessed 20 May. 2026.

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Synonyms of fluctuate

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