Word.ws English Dictionary

Synonyms of viscous

11 similar words · 3 opposite words

Another word for viscous is thick. Other synonyms of viscous are viscid, slabby, stiff and thickflowing. The opposite of viscous is fluid.

Synonyms and similar words for viscous

adjectiveHaving a thick, sticky consistency between solid and liquid (that is, a high viscosity).

adjectiveMore synonyms

  • lentousViscid; viscous; tenacious.
  • glutinous
  • gooeyHaving the consistency of goo: soft or viscous, and sticky.
  • slabbyOf a liquid: thick; viscous.
  • stiffHaving a dense consistency; thick; (by extension) Difficult to stir.
  • thickHaving a viscous consistency.
  • treacly

Opposite of viscous

adjectiveHaving a thick, sticky consistency between solid and liquid (that is, a high viscosity).

adjectiveMore antonyms

Meaning of viscous

  1. adjective Having a thick, sticky consistency between solid and liquid (that is, a high viscosity).
  2. adjective Of or pertaining to viscosity.

Full definition of viscous

viscous in other languages

Questions about synonyms of viscous

What is another word for viscous?
Viscous has 11 synonyms on Word.ws, such as thick, viscid, slabby, stiff and thickflowing.
What is the opposite of viscous?
The opposite of viscous is fluid.
What does viscous mean?
Viscous means having a thick, sticky consistency between solid and liquid (that is, a high viscosity).

Source and license

Adapted from Wiktionary: viscous (page history and authors) and the entries of the words listed. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws grouped the synonyms and antonyms by meaning and added links. Wiktionary data of 2026-09-02.

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Cite this page: “Synonyms of viscous.” Word.ws, https://word.ws/synonyms/viscous. Based on Wiktionary, CC BY-SA 4.0.