Head cold and Influenza

Head cold noun - A common cold affecting the nasal passages and resulting in congestion and sneezing and headache.

Influenza and head cold are semantically related. In some cases you can use "Influenza" instead a noun phrase "Head cold".

Influenza noun - An acute febrile highly contagious viral disease.

Head cold and influenza are semantically related. Sometimes you can use "Head cold" instead a noun "Influenza".