Synonyms for
fast
Firmly or securely fixed in place
4 synonyms 4 letters

Found 4 Synonyms for Fast

Words that mean the same or similar to fast:

fasting
tightfirm
immobile

2 of these 4 words have its own synonym network. Click any highlighted word to explore its alternatives. The others are shown for reference.

All Definitions for Fast

Below are all the dictionary definitions of fast:

1Firmly or securely fixed in place
2Stable.
3Firm against attack
4Fortified by nature or art
5Impregnable
6Strong.
7Steadfast, with unwavering feeling. (Now mostly in set phrases like fast friend(s).)
8Moving with great speed, or capable of doing so
9Swift, rapid
10Light.
11Having a kinetic energy between 1 million and 20 million electron volts
12Often used to describe the energy state of free neutrons at the moment of their release by a nuclear fission or nuclear fusion reaction (i.e., before the neutrons have been slowed down by anything).
13Of a place, characterised by business, hustle and bustle, etc.
14Causing unusual rapidity of play or action.
15Able to transfer data in a short period of time.
16Deep or sound (of sleep)
17Fast asleep (of people).
18Not running or fading when subjected to detrimental conditions such as wetness or intense light
19Permanent.
20Having an extravagant lifestyle or immoral habits.
21Uncharacteristically mature or promiscuous for one's age.
22Ahead of the correct time or schedule.
23More sensitive to light than average.
24A train that calls at only some stations it passes between its origin and destination, typically just the principal stations.
25In a firm or secure manner, securely
26In such a way as not to be moved
27Safe, sound .
28Deeply or soundly .
29Immediately following in place or time
30Close, very near .
31Quickly, with great speed
32Within a short time .
33Ahead of the correct time or schedule.
34To practice religious abstinence, especially from food.
35To reduce or limit one's nutrition intake for medical or health reasons, to diet.
36To cause (a person or animal) to abstain, especially from eating.
37The act or practice of fasting, religious abstinence from food.
38Any of the fasting periods in the liturgical year.
39Tenacious
40Retentive.
41An acronym for remembering desirable characteristics for goal-setting: frequently discussed, ambitious, specific, transparent.
42A surname.
43Acronym of focused assessment with sonography for trauma.
44Acronym of firefighter assist and search team.
45Acronym of free advertising-supported streaming television
46Initialism of Five-hundred-meter Aperture Spherical Telescope.

Writing Tips

  • Use synonyms to avoid repeating the same word in a paragraph.
  • Choose synonyms that match the tone of your writing.
  • Not all synonyms are interchangeable — check context.
  • Using varied vocabulary improves readability scores.
Frequently Asked Questions

What are synonyms for fast?

Words like fasting, tight, firm, immobile are common synonyms for fast. These words share similar meanings and can often be used interchangeably depending on context.

How many synonyms does fast have?

We have identified 4 synonyms for fast in our database. The English language often has multiple words with overlapping meanings.

Can I use these synonyms in formal writing?

Most synonyms listed here are suitable for formal writing, but always check the specific context. Some synonyms carry slightly different connotations.

About synonyms for fast

Finding the right synonym for fast helps writers avoid repetition and add precision to their work. Defined as "Firmly or securely fixed in place", fast has 4 alternatives that can fit different contexts and tones.

Each synonym carries a slightly different shade of meaning. Fasting is the most direct replacement in most situations. Tight works well in formal or professional contexts. Firm is often preferred when the context calls for a more specific or nuanced expression.

When choosing a synonym, consider the connotation, formality level, and audience. Some alternatives work better in casual conversation while others shine in academic or professional writing. For example, using a more formal synonym in a business email can elevate your tone, while a casual synonym might feel more natural in creative writing or dialogue.

It is also worth noting that not all synonyms are perfectly interchangeable. The context of your sentence, the surrounding words, and the intended emotional impact all play a role in selecting the best alternative. The list above provides the most common and useful replacements for fast, but always read your sentence aloud to ensure the chosen word flows naturally.