ketose vs ketoheptose

ketose and ketoheptose both are nouns.

Word	Noun	Adjective	Verb	Adverb
ketose	Yes	No	No	No
ketoheptose	Yes	No	No	No

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

ketose: any monosaccharide sugar that contains a ketone group or its hemiacetal
ketoheptose: A seven-carbon sugar possessing a ketone group.

Other hyponyms of ketose include ketohexose, ketotetrose, ketotriose.

ketose (noun)	ketoheptose (noun)
any monosaccharide sugar that contains a ketone group or its hemiacetal	A seven-carbon sugar possessing a ketone group.