Synonyms of viscous

viscous

adjective

ˈvi-skəs 

as in thick

being of a consistency that resists flow

viscous syrup that takes forever to pour from a narrow-neck bottle

Synonyms & Similar Words

• thick
• sticky
• syrupy
• heavy
• viscid
• ropy
• creamy
• turbid
• thickened
• condensed
• gelatinous
• undiluted
• glutinous
• thickish
• gooey
• gummy
• concentrated
• slushy
• gluey
• semifluid
• semiliquid
• jellylike

Antonyms & Near Antonyms

• thin
• runny
• watery
• fluid
• liquid
• soupy
• flowing
• weak
• dilute
• diluted
• watered-down

Example Sentences

Recent Examples of viscous

And more than half of Venezuela’s barrels are destined for the United States, where refineries in the Gulf are capable of processing its heavy, viscous form of crude, said Jungman. — Anna Cooban, CNN Money, 2 Aug. 2026

Replacing the silicon oil isn’t a simple solution, because as Kalfas says, the complicated design of viscous dampers generally requires complete removal and maintenance or replacement by the manufacturer. — New Atlas, 24 July 2026

Neusch saw a couple of the house’s fire-andys roll along the balcony, their extinguisher nozzles deployed over the railings, pumping clouds of viscous yellow retardant foam into the atrium. — Jeff Spry, Space.com, 26 June 2026

The primary health benefit of oats comes from beta-glucan, a viscous soluble fiber that affects cholesterol metabolism. — Anna Giorgi, Verywell Health, 26 June 2026