1. (n.) The quality or state of being viscous.

2. (n.) A quality analogous to that of a viscous fluid, supposed to be caused by internal friction, especially in the case of gases.

adhesiveness bullheadedness clabbering clamminess closeness clotting coagulation cohesiveness colloidality compactness congestedness congestion consistence consistency crowdedness curdling denseness density doughiness firmness gelatinity gelatinousness gluelikeness gluiness glutinosity glutinousness gumlikeness gumminess hardness heaviness impenetrability impermeability imporosity incompressibility incrassation inspissation jammedness jellification jellylikeness lentor mucilaginousness obstinacy pastiness persistence persistency relative density retention ropiness slabbiness sliminess snugness solidity solidness specific gravity spissitude stick-to-itiveness stickiness stodginess stringiness stubbornness syrupiness tackiness tenaciousness tenacity thickening thickness tightness toughness treacliness viscidity viscousness