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

That is a huge challenge, as hydrogen, natural gas, and relatively viscous kerosene behave very differently. — Georgina Jedikovska, Interesting Engineering, 28 Sep. 2026

The viscous formula is powered by four plant ferments (soybean, barley, pomegranate, and Korean pear, to name a few) and works wonders to rejuvenate skin in a single use. — Kiana Murden, Vogue, 25 Sep. 2026

The researchers linked molecules from a viscous oil and a gas to produce a new variation of this polymer, resulting in a transparent, moldable goo with a consistency similar to Blu Tack. — New Atlas, 21 Sep. 2026

Their road trip veers profanely off course with Sheridan exhibiting a cruel streak that’s viscous, sociopathic and even repellent. — Randy Myers, Mercury News, 26 Aug. 2026