is a specific kind of: connectedness, connection, link.

is a broader term that covers: consistency | continuity.

is the opposite of: incoherence, incoherency.

derivation: adhere, cleave, cling, cohere, stick | coherent, tenacious | cohesive | cohesive.

is a specific kind of: viscosity, viscousness.

derivation: gluey, glutinous, gummy, mucilaginous, pasty, sticky, viscid, viscous | ropey, ropy, stringy, thready | tacky.