viscious

Adjective

vicious (comparative more vicious or viciouser, superlative most vicious or viciousest)

1. Violent, destructive and cruel.
2. Savage and aggressive.
   • He had always been remarkably immune from such little ailments, and had only once in his life been ill, of a vicious pneumonia long ago at school. He hadn't the faintest idea what to with a cold in the head, he just took quinine and continued to blow his nose.1922, Michael Arlen, “2/9/1”, in “Piracy”: A Romantic Chronicle of These Days
3. (archaic) Pertaining to vice; characterised by immorality or depravity.
   • We may so seize on vertue, that if we embrace it with an over-greedy and violent desire, it may become vicious., Folio Society, 2006, vol.1, p.195

See all 4 meanings of vicious

Adjective

viscous (comparative more viscous, superlative most viscous)

1. Having a thick, sticky consistency between solid and liquid (that is, a high viscosity).
   • […] The flesh [of the mistletoe berry] is sticky, and forms strings and ribbons between my thumb and forefinger. For the mistletoe, this viscous goop – and by the way, viscous comes to English from viscum – is crucial. The stickiness means that, after eating the berries, birds often regurgitate the...2014 December 23, Olivia Judson, “The hemiparasite season [print version: Under the hemiparasite, International New York Times, 24–25 December 2014, page 7]”, in The New York Times, archived from the...

   Synonyms:

   syrupy, viscid, viscose, thickflowing

   Antonyms:

   inviscid

2. Of or pertaining to viscosity.
   • viscous coefficient