Cattail and Reed mace

Cattail noun - Tall erect herbs with sword-shaped leaves; cosmopolitan in fresh and salt marshes.

Reed mace and cattail are semantically related. In some cases you can use "Reed mace" instead a noun "Cattail".

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.

Cattail and reed mace are semantically related. You can use "Cattail" instead a noun phrase "Reed mace".