Example : Ardent love.
An ardent lover.
A fervent desire to change society.
A fervent admirer.
Fiery oratory.
An impassioned appeal.
A torrid love affair.

Synonyms : fervent, fervid, fiery, impassioned, perfervid, torrid

Example : Ardent revolutionaries.
Warm support.

Synonyms : warm

Example : From rank to rank she darts her ardent eyes.
Frightened by his ardent burning eyes.