Fluid
Fluid adjective - Capable of moving like a liquid.
Usage example: warm the jam until it is fluid, then spread it over the cake
Nearby Word: fluidity
Viscous
Viscous adjective - Being of a consistency that resists flow.
Usage example: viscous syrup that takes forever to pour from a narrow-neck bottle
Both words in one sentence
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The lava also seems less dangerous than it should be (it is too bright, too fluid and not viscous enough).
Source: Anime / Mazinkaiser - In the video for Michael Jackson's "Thriller", one of the zombies encountered is slobbering some sort of viscous black fluid from its mouth.
Source: Bad Black Barf -
Neon Genesis Evangelion: You wouldn't know it from a casual glance, but the EVA pilots' cockpits are filled with LCL, a viscous orange fluid that is somehow made transparent.
Source: Super Not-Drowning Skills
Cite this Source
Viscous and Fluid. (2016). Retrieved 2026, August 09, from https://thesaurus.plus/related/fluid/viscous
Fluid & Viscous. N.p., 2016. Web. 09 Aug. 2026. <https://thesaurus.plus/related/fluid/viscous>.
Viscous or Fluid. 2016. Accessed August 09, 2026. https://thesaurus.plus/related/fluid/viscous.
Google Ngram Viewer shows how "fluid" and "viscous" have occurred on timeline