\Fer"vor\, n. [Written also {fervour}.] [OF. fervor,
fervour, F. ferveur, L. fervor, fr. fervere. See {Fervent}.]
1. Heat; excessive warmth.
         The fevor of ensuing day.             --Waller.
2. Intensity of feeling or expression; glowing ardor;
   passion; holy zeal; earnestness. --Hooker.
         Winged with fervor of her love.       --Shak.
Syn: {Fervor}, {Ardor}.
Usage: Fervor is a boiling heat, and ardor is a burning heat.
       Hence, in metaphor, we commonly use fervor and its
       derivatives when we conceive of thoughts or emotions
       under the image of ebullition, or as pouring
       themselves forth. Thus we speak of the fervor of
       passion, fervid declamation, fervid importunity,
       fervent supplication, fervent desires, etc. Ardent is
       used when we think of anything as springing from a
       deepseated glow of soul; as, ardent friendship, ardent
       zeal, ardent devotedness; burning with ardor for the
       fight.