While often used to describe liquids, 'viscous' applies to semi-solids or thick pastes too. The viscous paste was difficult to spread evenly on the surface.
Pro Tip 2/3
Feeling Sluggish
'Viscous' can describe movement that seems slow and laborious, as if through a thick substance. Time felt viscous as he awaited the interview results.
Pro Tip 3/3
Sensory Experience
Use 'viscous' for tactile experiences where touch reveals the thickness or resistance of a substance. She could feel the viscous cream between her fingers.