Amanita and Fly agaric

Amanita noun - Genus of widely distributed agarics that have white spores and are poisonous with few exceptions.

Fly agaric and amanita are semantically related. In some cases you can replace phrase "Fly agaric" with "Amanita", this terms are similar.

Fly agaric noun - Poisonous (but rarely fatal) woodland fungus having a scarlet cap with white warts and white gills.

Amanita and fly agaric are semantically related. You can use "Amanita" instead a noun phrase "Fly agaric".