Hexose and Simple sugar

Hexose noun - A monosaccharide that contains six carbon atoms per molecule.

Simple sugar and hexose are semantically related. In some cases you can use "Simple sugar" instead a noun "Hexose".

Simple sugar noun - A sugar (like sucrose or fructose) that does not hydrolyse to give other sugars; the simplest group of carbohydrates.

Hexose and simple sugar are semantically related. Sometimes you can replace term "Hexose" with "Simple sugar", this terms are similar.