Each reliable synonym quietly answers its own question. Will this person show up? Then they are dependable. Will they keep a secret? Then they are trustworthy. Will the car start in winter? Then it is sturdy or trouble-free. Can you quote this report in a paper? Then it is credible.
Further down: five senses and their strongest words, a casual to formal chip strip, resume edits, and opposites for things that let you down. Two neighboring pages are worth a look too: consistent synonyms and trust synonyms.
Swatch at a glance
Best swaps
dependable, trustworthy, consistent, credible, steadyPart of speech
Adjective (adverb reliably, noun reliability)Best for resumes
dependable, conscientious, consistentBest for sources
credible, reputable, authoritativeMost casual
solid, true-blue, like clockworkAntonyms
unreliable, flaky, erratic, dubiousWatch out
Trustworthy is about honesty; dependable is about showing up. A punctual liar is dependable but not trustworthy.
Match the reliable synonym to the subject
People, products and sources each have their own set of words. Mixing them sounds off: few readers would call a website sturdy.
| Subject | Strong picks | In a sentence |
|---|---|---|
| Coworker, friend | dependable, responsible, steadfast | Omar is the most dependable person on our shift. |
| Partner, ally | trustworthy, faithful, true-blue | A trustworthy partner tells you bad news early. |
| Tool, car, laptop | sturdy, durable, robust, trouble-free | This old drill is still sturdy. |
| News, data, study | credible, reputable, sound | Cite only reputable sources. |
| Bus, delivery, income | steady, regular, unfailing | Freelancers want a steady income. |
| Method, recipe | proven, tried and tested, foolproof | This bread recipe is foolproof. |
Solid to credible: tone and formality
On the chip strip, solid is relaxed, the word a manager might use in a hallway: he is a solid hire. Steady stays informal but warm. Dependable is the polished, all-purpose middle. Trustworthy adds a moral layer. Credible leans academic and suits evidence more than people.
For a reference letter, the middle three read best. Credible about a person can sound as if you once doubted them.
Resume and reference letter wording
Recruiters see reliable in many applications, so a fresher word plus proof stands out.
- Reliable team member becomes dependable team member with zero missed shifts in two years.
- Reliable with deadlines becomes consistent in meeting every quarterly deadline.
- Reliable with money becomes trusted to handle the daily cash count.
A shop owner wrote a reference: "Leah is reliable." She revised it to: "Leah is the person I hand the keys to when I travel. In three years she has never opened late." Specific trust beats a general adjective, and the word dependable now hardly needs saying.
Job seekers can borrow further phrasing from resume and work words.
Other swaps in everyday writing
- A reliable source becomes a credible source or a reputable source.
- Reliable internet becomes a stable connection.
- A reliable old truck becomes a sturdy old truck.
- The trains are reliable here becomes the trains run like clockwork here.
- Reliable results becomes consistent results or repeatable results in science writing.
For the adverb reliably, use consistently, dependably or without fail: the alarm sounds without fail at six. For the noun reliability, try dependability, consistency or track record.
Where people slip up
Accurate means correct, not repeatable. A scale can be reliable, always showing the same weight, yet inaccurate because it is set two pounds too high. Researchers keep these two words apart, so do the same in lab reports; the accurate synonyms page explains the second one. Predictable can sound dull or negative about a person. Loyal is about sticking with someone, not about doing tasks well.
Antonyms for things that let you down
Unreliable and undependable are the direct opposites. Flaky is casual and aimed at people who cancel plans. Erratic and inconsistent suit performance that jumps up and down. Dubious and shaky fit doubtful claims.
- My old printer is erratic; some days it works.
- The study rests on shaky data.
More adjectives are grouped in the describing words hub.
Frequently asked questions
What word on a resume can replace reliable?
Dependable and conscientious both land well. Add a fact right after, perhaps perfect attendance or a deadline record, so the claim feels earned.
Is trustworthy the same as reliable?
Partly. Reliable means you can count on someone to act; trustworthy means you can count on their honesty.
How should I describe a reliable source in an essay?
Call it credible, reputable or authoritative. Then name why: peer review, expert authors or official data.
Which casual words mean reliable?
Solid, steady and true-blue are relaxed. You can also say something runs like clockwork or that a friend always has your back.
What is the antonym of reliable?
Unreliable is the direct one. Flaky, erratic and untrustworthy help when you need to show how someone or something lets you down.
Can I say consistent instead of reliable?
Yes, when the point is the same result each time: consistent quality, consistent effort. It is less suited to honesty or loyalty.