Thesaurus.com
Dictionary.com
Showing results for high-speed. Search instead for highspeed.
Definitions

high-speed

[hahy-speed] / ˈhaɪˈspid /
ADJECTIVE
breakneck
Synonyms
STRONGEST
headlong rapid
WEAK
at full tilt dangerously fast excessive flat out lightning precipitate reckless speedy whirlwind
Antonyms
WEAK
extremely slow
ADJECTIVE
express
Synonyms
STRONG
accelerated fast nonstop quick rapid swift
WEAK
velocious
Antonyms
STRONG
slow sluggish
WEAK
imprecise indefinite indirect obscure uncertain vague
ADJECTIVE
jazzed-up
Synonyms
WEAK
gassed-up high geared high performance hopped-up pepped-up pumped-up revved-up speedy supercharged

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Last year, the government confirmed the high-speed rail project would not be completed as planned by 2033.

From BBC • Apr. 16, 2026

Over an hour into a high-speed chase with the suspect, the sheriff’s department botched the deployment of a “grappler” net system intended to entangle the back wheels of the car to slow it down.

From Los Angeles Times • Apr. 12, 2026

The components include sensors, so-called coreless motors that power precise high-speed movements and speed reducers often used in joints to mimic human motions.

From The Wall Street Journal • Apr. 3, 2026

The customer is addressing the “rapidly accelerating demand for high-speed fiberoptic communication links in hyperscale AI and cloud data centers,” according to Aehr.

From Barron's • Apr. 3, 2026

My heart is pumping like a high-speed train.

From "Code Name Kingfisher" by Liz Kessler