Avoirdupois weight and System of weights

Avoirdupois weight noun - A system of weights based on the 16-ounce pound (or 7,000 grains).

System of weights and avoirdupois weight are semantically related. In some cases you can use "System of weights" instead a noun phrase "Avoirdupois weight".

System of weights noun - A system of units used to express the weight of something.

Avoirdupois weight and system of weights are semantically related. Sometimes you can replace phrase "Avoirdupois weight" with "System of weights", this phrases are similar.