What's the difference between surbase and surbased?

Surbase

Definition:

• (n.) A cornice, or series of moldings, on the top of the base of a pedestal, podium, etc. See Illust. of Column.
• (n.) A board or group of moldings running round a room on a level with the tops of the chair backs.

Example Sentences:

Surbased

Definition:

• (a.) Having a surbase, or molding above the base.
• (a.) Having the vertical height from springing line to crown less than the half span; -- said of an arch; as, a segmental arch is surbased.

Example Sentences: