simple sugar vs ketose

simple sugar and ketose both are nouns.

Word	Noun	Adjective	Verb	Adverb
simple sugar	Yes	No	No	No
ketose	Yes	No	No	No

As nouns, ketose is a hyponym of simple sugar; that is, ketose is a word with a more specific, narrower meaning than simple sugar:

simple sugar: a sugar (like sucrose or fructose) that does not hydrolyse to give other sugars; the simplest group of carbohydrates
ketose: any monosaccharide sugar that contains a ketone group or its hemiacetal

Other hyponyms of simple sugar include triose, tetrose, pentose, hexose, aldose, heptose.

simple sugar (noun)	ketose (noun)
a sugar (like sucrose or fructose) that does not hydrolyse to give other sugars; the simplest group of carbohydrates	any monosaccharide sugar that contains a ketone group or its hemiacetal