Sour milk, a botched repair and a con artist's scheme can all be called bad, but each needs a different replacement. The milk is spoiled, the repair shoddy or poor, the scheme wicked. Beyond those, severe fits a storm or an injury, grim fits news with little hope, and harmful or detrimental fits whatever damages your health.
Best synonyms for bad
Poor in quality or skill
- poor
- awful
- lousy
- inferior
- subpar
- shoddy
- mediocre
Severe or unpleasant
- severe
- serious
- terrible
- nasty
- grim
- dire
Wicked or misbehaving
- wicked
- evil
- immoral
- corrupt
- naughty
Spoiled food
- spoiled
- rotten
- rancid
- sour
Harmful to health or well-being
- harmful
- unhealthy
- damaging
- detrimental
Which synonym should you use?
| If you mean… | Best alternatives |
|---|---|
| A weak performance or result | poor, subpar, mediocre |
| Cheaply or carelessly made goods | shoddy, inferior |
| A serious injury or storm | severe, serious, nasty |
| News or an outlook with little hope | grim, dire, terrible |
| Cruel or unethical behavior | wicked, evil, immoral, corrupt |
| A child or pet misbehaving | naughty |
| Food that is no longer fit to eat | spoiled, rotten, sour, rancid |
| Something that damages your health | harmful, unhealthy, damaging, detrimental |
Bad synonyms explained
1. Poor
The neutral choice for weak quality or skill, milder than lousy and without the blame that shoddy implies. It works for results, conditions and abilities alike.
Best used when: You want to grade something as weak without sounding angry about it.
The test results were poor in every subject.
2. Shoddy
Blames careless making: cheap materials, rushed repairs, sloppy reporting. Where poor only grades the outcome, shoddy implies someone cut corners.
Best used when: Workmanship or goods were clearly made without care.
The landlord's shoddy repairs let the rain back in within a month.
3. Lousy
Informal and personal, as in a lousy night's sleep or a lousy boss. It carries more irritation than poor but less force than awful.
Best used when: You are complaining in casual speech or an informal message.
I had a lousy week, and it ended with a flat tire.
4. Awful
A step up in force from poor and lousy. It describes something unpleasant to taste, hear or live through, and everyday speech stretches it to coffee, singing and traffic. Terrible is the better pick when real harm or distress is involved.
Best used when: A quality problem is bad enough to be unpleasant, not just weak.
The coffee at the station was awful.
5. Mediocre
Means middling, neither failing nor good, so it is weaker than bad itself. It suits a verdict that stings by being lukewarm, and it differs from inferior, which compares one thing to another.
Best used when: Something was unremarkable and you want to say so without an insult.
The food was mediocre: nothing offensive, nothing memorable.
6. Terrible
Carries real weight when the subject is a harm: a terrible accident, terrible news. Awful often just grumbles about quality, while terrible can signal that something caused serious distress.
Best used when: An event or outcome is truly upsetting, not merely disappointing.
A terrible fire destroyed the warehouse overnight.
7. Severe
Measures degree or harshness of something physical or measurable: severe pain, severe weather, a severe shortage. It is more exact and more formal than nasty, which sounds conversational.
Best used when: You are describing how intense an injury, storm or shortage is.
He was treated for a severe burn on his forearm.
8. Grim
Fits news, outlooks and conditions that offer little hope. It describes the mood of a situation, whereas severe describes its intensity.
Best used when: The facts are discouraging and nothing in them softens the picture.
The report gave a grim picture of the town's finances.
9. Wicked
Implies deliberate cruelty or malice, not just rule-breaking. Immoral is a judgment about ethics, and evil is stronger and bleaker than wicked, which can sound like a storybook villain.
Best used when: A person, plan or act is cruel on purpose.
The wicked scheme ruined dozens of families.
10. Naughty
Reserved for children and pets who misbehave, usually with mild scolding. Said of adults it sounds playful or hints at something risqué, so it cannot stand in for wicked when the wrongdoing is serious.
Best used when: A child or animal is being disobedient in a small way.
The puppy was naughty again and chewed through a shoe.
11. Spoiled
Food that is past safe or pleasant use, such as milk, leftovers or fruit. Rotten is stronger and points to visible decay.
Best used when: Something in the refrigerator has outlasted its freshness.
The milk was spoiled by Tuesday, so we threw it out.
12. Rotten
Describes food or organic matter that is visibly decaying, like eggs, fruit or wood. Casual speech also uses it for luck and moods, in lines like rotten luck, where spoiled would not work.
Best used when: Decay is obvious from the look or smell.
A rotten smell came from the bag of forgotten potatoes.
13. Rancid
Belongs to fats and oils: butter, cooking oil, nuts, bacon. Where rotten suggests decay you can see, rancid names the sharp, stale smell and taste of fat that has turned; milk that has gone bad is usually called sour instead.
Best used when: Butter, oil or nuts smell sharp and stale.
The walnuts had sat in the pantry too long and tasted rancid.
14. Harmful
Says something can damage health, the environment or people. It takes to, as in harmful to children, and it is plainer than detrimental.
Best used when: You want a clear, everyday word for something that causes damage.
Some cleaning products are harmful to pets.
15. Detrimental
Formal, and it needs a to phrase naming what suffers. It speaks of negative effects on health, progress or morale and sounds stiffer than harmful.
Best used when: A report, policy or formal piece of writing is weighing negative effects.
Correct: Constant noise is detrimental to learning.
Incorrect: Late nights are detrimental for your health.
The second sentence is wrong because detrimental takes to, not for. The correct form is Late nights are detrimental to your health.
FAQ
Is it feel bad or feel badly?
Use feel bad for guilt, sorrow or illness: I feel bad about the delay. After feel, the adjective describes your state, while badly describes how an action is done, so feel badly is usually treated as a mistake in careful writing. For a more precise word, feel guilty, feel sorry or feel ashamed name the feeling itself.
Can bad stand in for badly in a sentence?
In casual US speech it does: we need water bad. In writing, use badly or very much, as in We badly need water. Standard writing keeps bad for adjectives.