INSTANTANEOUSLY Synonyms: 63 Similar and Opposite Words

instantaneously

adverb

as in immediately

without delay I had just slammed the car door shut when I instantaneously remembered that I had left the keys inside

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

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 instantaneously Also, if the switch from side by side to one-front/one-back happened instantaneously, your brain would get confused about how to interpret the images delivered from each eye, since the setup would be quite different from what you were used to. — Abigail Witmer, The Conversation, 31 Aug. 2026 While fans have clamored for tickets, many were disappointed and frustrated with high prices and limited availability that seemed to sell out almost instantaneously. — Los Angeles Times, 21 Aug. 2026 The secret lies in servo motors at the end of each propeller arm, which instantaneously tilt the props fore and aft as needed. — New Atlas, 10 Aug. 2026 As the gas rapidly accumulates within these tiny crevices, the bubbles expand almost instantaneously and push the beverage violently out of the bottle to create a soda fountain, also called a geyser. — Encyclopedia Britannica, 5 Aug. 2026 Building cars is one thing, but building that kind of instantaneously recognizable brand requires a deft hand. — Michael Teo Van Runkle, Forbes.com, 1 Aug. 2026 As fresh visual information reaches the brain, these models are updated almost instantaneously, allowing movements to be adjusted before conscious awareness has caught up. — Michelle Spear, Scientific American, 11 July 2026 The chicken and the egg come into existence instantaneously and simultaneously. — Peter Gosselin, Harpers Magazine, 30 June 2026 Almost instantaneously, Garcia drew his weapon and fired nine shots at Denis’s departing vehicle. — Brittany Wallman, Miami Herald, 24 June 2026

Recent Examples of Synonyms for instantaneously

Adverb

But that bipartisan effort was immediately panned by conservative groups, and little else has emerged as a serious solution.

— Ashley Lopez, NPR, 28 Aug. 2026
Though freshman Jackson Cantwell likely could have stepped in immediately at left tackle, the junior Okunlola has the game experience (albeit mostly at guard) that should serve him well in taking on the opponent’s best edge rusher.

— Barry Jackson, Miami Herald, 28 Aug. 2026

Definition of immediately

Adverb

Playing the helpful citizen, Martinez drove his literal truckload of ALPR bits directly to the Sheriff’s department, where he was promptly taken into custody.

— Joe Wilkins, Futurism, 3 Sep. 2026
Few character intros in movie history are better than Indiana Jones snagging that golden idol before being promptly chased by a giant boulder and a tribe of blowdart-wielding warriors.

— Frank DeRuggiero, Entertainment Weekly, 3 Sep. 2026

Definition of promptly

Adverb

Now Betancourt’s company, North American Blue Energy Partners, based in Barbados, could be one of the first private firms to directly participate in Venezuela’s oil industry since it was nationalized half a century ago.

— Ishaan Tharoor, New Yorker, 3 Sep. 2026
Playing the helpful citizen, Martinez drove his literal truckload of ALPR bits directly to the Sheriff’s department, where he was promptly taken into custody.

— Joe Wilkins, Futurism, 3 Sep. 2026

Definition of directly

Browse Nearby Words

instantaneous

instantaneously

instanter

See all Nearby Words

Cite this Entry

Style

“Instantaneously.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/instantaneously. Accessed 4 Sep. 2026.

Copy Citation

Synonyms of instantaneously

adverb

Example Sentences

Browse Nearby Words

Cite this Entry

More from Merriam-Webster

Word of the Day

apiary

Popular in Grammar & Usage

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

A List of Most Commonly Confused Words

Why do we use apostrophes to show possession?

Is it 'nerve-racking' or 'nerve-wracking'?

What's the difference between 'fascism' and 'socialism'?

Popular in Wordplay

The Longest Long Words List

Stay Woke

Ye Olde Nincompoop: Old-Fashioned Words for 'Stupid'

14 Phobias You Probably Haven't Heard Of

The Words of the Week - Sept. 4

Popular

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

The Longest Long Words List

Stay Woke

Games & Quizzes