tetrose vs ketotetrose

tetrose and ketotetrose both are nouns.

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

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

tetrose: any monosaccharide sugar containing four atoms of carbon per molecule
ketotetrose: A monosaccharide that has both a ketone and four carbons.

tetrose (noun)	ketotetrose (noun)
any monosaccharide sugar containing four atoms of carbon per molecule	A monosaccharide that has both a ketone and four carbons.