Pin down and Stipulate

Pin down verb - Attach with or as if with a pin.

Stipulate and pin down are semantically related in designate topic. In some cases you can use "Stipulate" instead a verb "Pin down", when it comes to topics like specify as selection.

Stipulate verb - Specify as a condition or requirement in a contract or agreement; make an express demand or provision in an agreement.

Pin down and stipulate are semantically related in decide on conditions topic. Sometimes you can use "Pin down" instead a verb "Stipulate".