Mull over and Pipe dream

Mull over verb - To give serious and careful thought to.

Pipe dream and mull over are semantically related. in think about seriously topic. In some cases you can use "Pipe dream" instead a verb "Mull over".

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

Mull over and pipe dream are semantically related. Sometimes you can use "Mull over" instead a verb phrase "Pipe dream".