Fungal diseases are a type of illness caused by various types of fungi. If you're looking for synonyms for the term "fungal disease", there are several options to choose from. Some possible options include "mycosis", "fungal infection", or "fungal illness". Each of these terms refers to the same basic condition, but they may be used in different contexts depending on the specific type of fungus or the symptoms present. Other possible synonyms might include "yeast infection", "ringworm", or "athlete's foot", which are all specific types of fungal infections that are commonly diagnosed and treated in medical settings.