Phantasm: an illusion or a ghost produced by imagination or creative invention. I enjoy watching my cats chase phantasms of my creation. Toes under sheets. Shadow puppets. Laser beams. etc.
Phantasmagoria: 1. a shifting succession of things seen or imagined. 2. A collection or combination of weird or imaginary things. My facebook page is a phantasmagoria.
Phenomenon: a fact or event observed or known with the senses. 2. A rare, unusual, or important fact or event. The way that researchers confirmed Einsteins theory of relativity by measuring the bending of light by an eclipse was phenomenal.
Diaphanous: 1. Transparent. 2. Insubstantial or vague. Mist is diaphanous. A sheer nightgown is diaphanous. However, a diaphanous idea would be one without much real substance behind it.
