Polyose and Saccharide

Polyose noun - Any of a class of carbohydrates whose molecules contain chains of monosaccharide molecules.

Saccharide and polyose are semantically related. In some cases you can use "Saccharide" instead a noun "Polyose".

Saccharide noun - An essential structural component of living cells and source of energy for animals; includes simple sugars with small molecules as well as macromolecular substances; are classified according to the number of monosaccharide groups they contain.

Polyose and saccharide are semantically related. Sometimes you can replace term "Polyose" with "Saccharide", this nouns are similar.