ardor

passion, fervor, ardor, enthusiasm, zeal mean intense emotion compelling action. passion applies to an emotion that is deeply stirring or ungovernable.

• • was a slave to his passions

fervor implies a warm and steady emotion.

• • read the poem aloud with great fervor

ardor suggests warm and excited feeling likely to be fitful or short-lived.

• • the ardor of their honeymoon soon faded

enthusiasm applies to lively or eager interest in or admiration for a proposal, cause, or activity.

• • never showed much enthusiasm for sports

zeal implies energetic and unflagging pursuit of an aim or devotion to a cause.

• • preaches with fanatical zeal