Eccentric and One-off

Eccentric noun - A person of odd or whimsical habits.

One-off and eccentric are semantically related. (British) In some cases you can use "One-off" instead a noun "Eccentric". informal substitute

Nearby Words: eccentricity, eccentrically, eccentrical

One-off noun - A happening that occurs only once and is not repeated.

Eccentric and one-off are semantically related. Sometimes you can replace term "Eccentric" with "One-off", this terms are similar.