It has come to my attention that almost nobody seems to be able to spell the word VICIOUS. (That I should have even noticed this is in itself is a worry; why does this word get used so much?)
VICIOUS, pronounced VISH-us, derives from VICE (as in squad, not as in carpentry or captains). There is no S in the word VICE.
The word VISCOUS, pronounced VISS-cuss, means 'thick and sticky'.
The word VISCOSE, pronounced VISS-coze, is the name of a synthetic fabric akin to rayon, polyester and so on, as in 'Do you know how many little viscoses died to make those tracky daks?'
There is no such word as VISCIOUS.