fervor

Earnestness is a related term of fervor.

As nouns the difference between earnestness and fervor

is that earnestness is the quality of being earnest; sincerity; seriousness while fervor is (us) an intense, heated emotion; passion, ardor.

Fervor is a related term of eagerness.

As nouns the difference between fervor and eagerness

is that fervor is (us) an intense, heated emotion; passion, ardor while eagerness is the state or quality of being eager; ardent desire.

Warmth is a related term of fervor.

As nouns the difference between warmth and fervor

is that warmth is a moderate degree of heat; the sensation of being warm while fervor is (us) an intense, heated emotion; passion, ardor.

As nouns the difference between favor and fervor

is that favor is a kind or helpful deed; an instance of voluntarily assisting (someone) while fervor is an intense, heated emotion; passion, ardor.

As a verb favor

is   To look upon fondly; to prefer.

As a noun fervor

is an intense, heated emotion; passion, ardor.

As an adjective ardent is

full of ardor; fervent, passionate.

As nouns the difference between fervor and heat

is that fervor is an intense, heated emotion; passion, ardor while heat is thermal energy.

As a verb heat is

to cause an increase in temperature of an object or space; to cause something to become hot often with "up".

As an adjective fervorous

is with fervour; fervent.

As a noun fervor is

an intense, heated emotion; passion, ardor.

As a noun fervor

is an intense, heated emotion; passion, ardor.

As an adjective ebullient is

enthusiastic; high-spirited.