ketose vs ketotetrose

ketose and ketotetrose both are nouns.

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

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

ketose: any monosaccharide sugar that contains a ketone group or its hemiacetal
ketotetrose: A monosaccharide that has both a ketone and four carbons.

Other hyponyms of ketose include ketohexose, ketotriose, ketoheptose.

ketose (noun)	ketotetrose (noun)
any monosaccharide sugar that contains a ketone group or its hemiacetal	A monosaccharide that has both a ketone and four carbons.