Fungi and Pest

Fungi noun - The taxonomic kingdom including yeast, molds, smuts, mushrooms, and toadstools; distinct from the green plants.

Pest and fungi are semantically related. in disease topic. In some cases you can use "Pest" instead a noun "Fungi".

Pest noun - A widespread disease resulting in a high rate of death.

Fungi and pest are semantically related. Sometimes you can replace term "Fungi" with "Pest", this nouns are similar.