Build castles in air and Fly in the face of

Fly in the face of and build castles in air are semantically related. In some cases you can use "Fly in the face of" instead a verb phrase "Build castles in air".

Fly in the face of verb - Go against.

Build castles in air and fly in the face of are semantically related. Sometimes you can use "Build castles in air" instead a verb "Fly in the face of".