Nailrod and Reed mace

Nailrod noun - Tall marsh plant with cylindrical seed heads that explode when mature shedding large quantities of down; its long flat leaves are used for making mats and chair seats; of North America, Europe, Asia and North Africa.

Reed mace is a synonym for nailrod. In some cases you can use "Reed mace" instead a noun "Nailrod".

Reed mace noun - Tall marsh plant with cylindrical seed heads that explode when mature shedding large quantities of down; its long flat leaves are used for making mats and chair seats; of North America, Europe, Asia and North Africa.

Nailrod is a synonym for reed mace. You can use "Nailrod" instead a noun phrase "Reed mace".