Make a knot and Tack on

Tack on and make a knot are semantically related. In some cases you can use "Tack on" instead a verb phrase "Make a knot".

Tack on verb - To join (something) to a mass, quantity, or number so as to bring about an overall increase.

Make a knot and tack on are semantically related. Sometimes you can use "Make a knot" instead a verb "Tack on".