Fluor and Fluorine

Fluor noun - A soft mineral (calcium fluoride) that is fluorescent in ultraviolet light; chief source of fluorine.

Fluorine and fluor are semantically related. In some cases you can use "Fluorine" instead a noun "Fluor".

Fluorine noun - A nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite.

Fluor and fluorine are semantically related. You can use "Fluor" instead a noun "Fluorine".