Bend. A knot used to join two ropes.
Binding knot. A knot that constricts a line/object, with the ends joined or tucked under the turns of a knot.
Hitch. A knot that joins a rope to an object (ring, rail, post etc).
Friction hitch. A knot that binds one rope to another and that allows for re-positioning.
Jamming. A knot that jams(difficult to untie) after use.
Non-jamming. A knot that tightens when under load, but that doesn't jam.
Loop knot. A knot used to create a closed circle.
Standing end. The part of a rope that is not made into a knot.
Working end. The part of a rope that is made into a knot.

Knots to learn to tie behind your back: