IPA: //ˈfaʊlˌpɒks//
KK: /faʊlpɑks/
A disease that affects birds, especially chickens, caused by specific viruses.
The farmer vaccinated his chickens to protect them from fowlpox.
Fowlpox is formed from "fowl" (from Old English *fugel*, meaning bird) and "pox" (from Middle English *pocche*, meaning a disease characterized by pustules). The term refers to a disease affecting birds, characterized by pustules on their skin.
Think of 'fowl' as referring to birds and 'pox' as a disease with pustules — together, they describe a disease that affects birds.
No commonly confused words.