Dog days and Fieriness

Dog days noun - The hot period between early July and early September; a period of inactivity.

Fieriness and dog days are semantically related In some cases you can use "Fieriness" instead a noun phrase "Dog days".

Fieriness noun - The heat or the color of fire.

Dog days and fieriness are semantically related in heat topic. Sometimes you can use "Dog days" instead a noun "Fieriness", if it concerns topics such as high temperature.