Fantast and Pipe dream

Fantast noun - One whose conduct is guided more by the image of perfection than by the real world.

Pipe dream and fantast are semantically related. In some cases you can use "Pipe dream" instead a noun "Fantast".

Pipe dream noun - A conception or image created by the imagination and having no objective reality.

Fantast and pipe dream are semantically related. Sometimes you can replace term "Fantast" with "Pipe dream", this terms are similar.