FERVOUR
ardor, ardour, fervor, fervour, fervency, fire, fervidness
(noun) feelings of great warmth and intensity; “he spoke with great ardor”
excitement, excitation, inflammation, fervor, fervour
(noun) the state of being emotionally aroused and worked up; “his face was flushed with excitement and his hands trembled”; “he tried to calm those who were in a state of extreme inflammation”
Source: WordNet® 3.1
Noun
fervour (countable and uncountable, plural fervours) (British spelling)
An intense, heated emotion; passion, ardour.
A passionate enthusiasm for some cause.
Heat.
Source: Wiktionary