Adhere vs Attach vs Comply vs Obey vs Stick

When to use each in English, with meaning, register, and examples.

Adhere

FormalTop 3,000 (common)C1verb

Attach

Top 1,000 (very common)B1verb

Comply

Top 5,000 (fairly common)C1verb

Obey

Top 1,000 (very common)B2verb

Stick

Top 1,000 (very common)B1verb
Most formal: Adhere
 AdhereAttachComplyObeyStick
Pronunciation🇬🇧 /["/ədˈhɪə(r)/","/ədˈhɪəz/","/ədˈhɪəd/","/ədˈhɪərɪŋ/"]/🇺🇸 /["/ədˈhɪr/","/ədˈhɪrz/","/ədˈhɪrd/","/ədˈhɪrɪŋ/"]/🇬🇧 /["/əˈtætʃ/","/əˈtætʃɪz/","/əˈtætʃt/","/əˈtætʃɪŋ/"]/🇺🇸 /["/əˈtætʃ/","/əˈtætʃɪz/","/əˈtætʃt/","/əˈtætʃɪŋ/"]/🇬🇧 /["/kəmˈplaɪ/","/kəmˈplaɪz/","/kəmˈplaɪd/","/kəmˈplaɪɪŋ/"]/🇺🇸 /["/kəmˈplaɪ/","/kəmˈplaɪz/","/kəmˈplaɪd/","/kəmˈplaɪɪŋ/"]/🇬🇧 /["/əˈbeɪ/","/əˈbeɪz/","/əˈbeɪd/","/əˈbeɪɪŋ/"]/🇺🇸 /["/əˈbeɪ/","/əˈbeɪz/","/əˈbeɪd/","/əˈbeɪɪŋ/"]/🇬🇧 /["/stɪk/","/stɪks/","/stʌk/","/ˈstɪkɪŋ/"]/🇺🇸 /["/stɪk/","/stɪks/","/stʌk/","/ˈstɪkɪŋ/"]/
MeaningTo stick to something or follow it closely.to connect or fasten something to another thingTo follow rules or requests.To do what someone tells you to do.A thin piece of wood or similar material.
ExampleOnce in the bloodstream, the bacteria adhere to the surface of the red cells.Please attach the document to your email before sending it.They refused to comply with the UN resolution.In order to maintain order, everyone must obey the rules.I need to stick this poster on the wall.
RegisterFormalNeutralNeutralNeutralNeutral
How commonTop 3,000 (common)Top 1,000 (very common)Top 5,000 (fairly common)Top 1,000 (very common)Top 1,000 (very common)
CEFR levelC1B1C1B2B1
Part of speechverbverbverbverbverb
Collocationsclosely, firmly, rigidly, tofirmly, securely, loosely, tofully, reluctantly, happily, fail to, refuse to, withimmediately, instantly, quickly, have to, must, refuse to, be only obeying orders, a duty to obey, an obligation to obeyclose, closely, rigidly, in, into, on, tend to, decide to, be determined to, close, closely, rigidly, in, into, on, tend to, decide to, be determined to
Antonymsdetach, separate, disobeydetach, removedisobey, ignore, floutdisobey, ignoreblock, obstacle
Common mistakesConfused with 'adhere to' vs 'stick to' — they are not interchangeable., Using 'adhere' without a clear object — it needs to specify what is being adhered to., Assuming 'adhere' can only refer to physical sticking — it can also refer to following rules.Confused with 'detach' – forgetting to use the right prefix., Using 'attaching' incorrectly in passive constructions., Not following with an object, e.g., 'attach to' instead of 'attach the document to'.Using 'comply' without the preposition 'with'., Confusing 'comply' with 'compromise'., Misusing the tense, such as saying 'complyed'.Confused with 'obeyed' in past tense usage., Using 'obey' without an object, which is incorrect., Mixing up 'obey' with 'comply' - they are similar but not interchangeable.Confused with 'stick' as a verb and its different meanings., Using it in plural form when referring to the concept generally., Mispronouncing the word, particularly in different dialects.
Usage notesUsed in formal contexts, often in legal or technical language. It's appropriate when discussing rules, guidelines, or sticky substances, but less common in casual conversation.Use 'attach' for both physical and abstract connections, like emails or documents. Less common in very formal writing. Avoid with informal language unless using slang.Used in formal contexts, such as legal settings or official instructions. Less common in casual conversations. Avoid using in situations where agreement is more appropriate.Use 'obey' in contexts involving rules, laws, or authority figures. It's suitable for both formal and casual situations, but avoid using it with someone you know well unless discussing serious issues.Used to describe a natural object found outdoors or as a tool. Avoid in formal contexts when describing something more substantial.

Frequently asked questions: Adhere vs Attach vs Comply vs Obey vs Stick

What's the difference between Adhere, Attach, Comply, Obey, and Stick?

Adhere: To stick to something or follow it closely. Attach: to connect or fasten something to another thing Comply: To follow rules or requests. Obey: To do what someone tells you to do. Stick: A thin piece of wood or similar material.

Which is more formal: Adhere, Attach, Comply, Obey, and Stick?

Adhere is the most formal of these.

Are Adhere, Attach, Comply, Obey, and Stick the same CEFR level?

Adhere: C1, Attach: B1, Comply: C1, Obey: B2, Stick: B1 on the CEFR scale.

What part of speech are Adhere, Attach, Comply, Obey, and Stick?

Adhere: verb, Attach: verb, Comply: verb, Obey: verb, Stick: verb.

Can you show an example of each?

Adhere: Once in the bloodstream, the bacteria adhere to the surface of the red cells. Attach: Please attach the document to your email before sending it. Comply: They refused to comply with the UN resolution. Obey: In order to maintain order, everyone must obey the rules. Stick: I need to stick this poster on the wall.

Can I use Adhere, Attach, Comply, Obey, and Stick interchangeably?

Not always. Adhere, Attach, Comply, Obey, and Stick are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

Related comparisons