Viscosity is resistance to flow. For liquids, typically the larger the intermolecular forces (IMF) the higher the viscosity. The other factors that affect viscosity are temperature and the shape of the molecule. Higher temperatures will correspond to higher average kinetic energies and faster moving molecules. This will lead to a lower viscosity. The shape will also affect the viscosity, as molecules with many branches or kinks will be harder to "slide-by" one another than small "round" molecules.
Thus, carbon tetrachloride (CCl4) has boiling point of 350 K. Propanol (C3H7OH) has a boiling point of 370 K. You could conclude from this that they have similar IMF. CCl4 is tetrahedral (which is essentially spherical) while propanol is a carbon chain with a very sticky end. This means propanol is likely harder to flow due to its shape. Indeed the viscosity of propanol is about twice that or carbon tetrachloride.