coupˈler noun

1. Someone who or something that couples or unites
2. An organ mechanism by which stops of one manual can be played from another or from the pedals
3. An acoustic coupler (qv)

coupˈlet noun

1. A pair, couple
2. A twin
3. Two successive lines of verse (esp) that rhyme with each other

coupˈling noun

1. That which connects
2. An appliance for transmitting motion in machinery, or for connecting vehicles, as in a railway train
3. The part of the body of a quadruped lying between the forequarters and hindquarters

coupˈling-box noun

The box or ring of metal connecting the contiguous ends of two lengths of shafts

well-coupled

Of a horse, well-formed at the part where the back joins the rump

a couple of

1. (loosely) two or three
2. A few