Cobweb vs Spiderweb: What’s the Difference?

Quick answer: Both words refer to a web spun by a spider. In everyday use, spiderweb is the plain, neutral word for the web itself, while cobweb usually suggests an old, dusty or tangled web in a corner. Cobweb is also used figuratively, as in “blow away the cobwebs.”

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Five quick questions on cobweb vs spiderweb. Pick an answer to get instant feedback.

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Cobweb

A spider’s web, especially an old, dusty or tangled one.

“Cobwebs hung in the attic.”

Spiderweb

The silk web a spider spins to catch prey.

“Dew sparkled on the spiderweb.”

Blow away the cobwebs

To clear your head or freshen up.

“A walk will blow away the cobwebs.”

Orb web

A round, wheel-shaped web spun by orb-weaving spiders.

“The orb web spanned the doorway.”

If you have ever paused over whether to write cobweb or spiderweb, you are not alone. The cobweb vs spiderweb question comes up in everyday writing, in poetry and even in cleaning tips. The words overlap, but they carry slightly different feelings.

TermMeaningPart of speech / CategoryExample sentence
CobwebA spider’s web, especially an old, dusty or tangled oneNoun“She brushed a cobweb from the shelf.”
SpiderwebThe silk web a spider spins to catch preyNoun“A spiderweb glittered in the morning light.”
Cobwebs (figurative)Mental fog, or signs of neglectNoun, plural (idiom)“A run will blow away the cobwebs.”

What does cobweb mean?

A cobweb is a spider’s web, and the word most often describes an old, dusty or tangled one. Think of the threads in a basement corner or across an attic beam.

It is always written as one word. The “cob” in cobweb comes from an old word for spider, so the term was once literally “spider web.”

What does spiderweb mean?

A spiderweb is the web a spider spins from silk, usually to catch insects. It is the plain, descriptive word and works for any web, whether fresh, neat or tangled.

You will see it written as one word (“spiderweb”), as two words (“spider web”) and as “spider’s web.” All of these forms appear in print, so follow your style guide, and keep the same form throughout a piece.

Cobweb vs spiderweb: how do they differ?

The difference is mostly about feeling and condition, not biology. Spiderweb is neutral and often brings to mind a fresh, intact web, while cobweb suggests age, dust and neglect.

Compare “dew clung to the spiderweb” with “cobwebs hung from the rafters.” The first picture is clean and delicate, and the second is dusty and abandoned. Both describe webs made by spiders.

Are cobwebs and spiderwebs different kinds of web?

In casual speech, not really, but in biology there are differences between web styles. Orb-weaving spiders spin the classic round, wheel-shaped web, while cobweb spiders build tangled, three-dimensional webs.

That is why many people use “cobweb” for the irregular webs found in corners and “spiderweb” for the round, patterned ones. Still, either word is acceptable for most webs, so the choice comes down to tone.

What does “cobwebs” mean figuratively?

Figuratively, cobwebs stand for mental fog, stale ideas or long neglect. The best-known phrase is “blow away the cobwebs,” which means to clear your head or freshen up.

Only “cobweb” is used in this idiom. You would not say “blow away the spiderwebs,” because the expression borrows the dusty, forgotten feeling of old cobwebs.

How can you remember which one to use?

Link each word to a picture. Cobweb goes with a dusty corner, and spiderweb goes with the web itself. The memory tricks below make it stick.

Common mistakes

  • ✗ The attic was full of cob webs.
    ✓ The attic was full of cobwebs.
  • ✗ A walk will blow away the spiderwebs.
    ✓ A walk will blow away the cobwebs.
  • ✗ A cobweb is a type of spider.
    ✓ A cobweb is a web. A cobweb spider is a spider that builds one.
  • ✗ The spiders web shone in the sun.
    ✓ The spider’s web shone in the sun.
  • ✗ Cobweb and spiderweb mean completely different things.
    ✓ Both refer to webs spun by spiders, but cobweb often suggests an old, dusty one.

Memory tricks

  • Cobweb = corner. Both start with “co,” so picture a dusty cobweb in a corner.
  • Spiderweb says it plainly. Spider plus web gives you the straightforward, neutral term.
  • Idiom check. If you mean “freshen up your mind,” the word is always cobwebs.

FAQ

What is the difference between cobweb and spiderweb?

Both mean a web spun by a spider. Spiderweb is the neutral term, while cobweb usually suggests an old, dusty or tangled web.

Is spiderweb one word or two?

Both forms appear. You can write “spiderweb” or “spider web,” while cobweb is always one word.

What does “blow away the cobwebs” mean?

It means to clear your head or freshen up, often by going outside or exercising.

Is a cobweb a kind of spider?

No. A cobweb is a web. A cobweb spider is a spider that builds a tangled web.

Why are old webs called cobwebs?

Dust tends to collect on abandoned webs, which makes them look gray and fuzzy, so the word came to suggest age and neglect.

Conclusion

The cobweb vs spiderweb choice is mostly about tone. Use spiderweb for the web itself, and use cobweb for dusty, tangled or neglected webs and the figurative phrase “blow away the cobwebs.” Share this with someone who is still writing “cob webs” as two words.

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