Not all Greek Revival architecture has monumental columns and an entablature. Other clues are:

Rectangular transom and side lights

Opennings above and on the side of the door.

Monumental frieze

The middle part of an entablature between the raking cornice and the architrave.

Monumental pilasters

Engaged columns, often no more than a board, especially at the corners of a building.

Shoulder architrave

The molding around a window or doorway that projects near the top of the opening.

Fretwork

A pattern in strips or bands of intersecting elements, either painted or in relief, that forms a border.

Antemion

A stylized honeysuckle motif.