elegant, eloquent

Elegant or elegant means stylish and sophisticated, graceful and refined--
Everyone remarked on her elegant ensemble.
We want an elegant look, nothing rustic or quaint.

Eloquent or eloquent describes speech that is persuasive, moving, and expressive--
The speaker was eloquent; many of the listeners were moved to support his campaign.
One eloquent speech can do more to move voters than a hundred ads.

Now that you know that, you can say--
"He was elegant in dress, eloquent in speech, and very popular with the crowds."

Note--"Elegance" is the noun ( thing or idea ) form of "elegant"--
Her fans admired her grace and elegance.
"Eloquence" is the noun ( thing or idea ) form of "eloquent"--
His eloquence persuaded many people to vote for him.