Part of speech: Noun
the state of being emotionally aroused and worked up
Example: his face was flushed with excitement and his hands trembled; he tried to calm those who were in a state of extreme inflammation
Part of speech: Noun
feelings of great warmth and intensity
Example: he spoke with great ardor
Inflammation, Fire, Fervour, Fervidness, Fervor
The word "fervor" comes from Latin fervor.
Legal and medical professions still use Latin phrases because of its precision and historical authority.