disaccharide vs oligosaccharide

disaccharide and oligosaccharide both are nouns.

Word	Noun	Adjective	Verb	Adverb
disaccharide	Yes	No	No	No
oligosaccharide	Yes	No	No	No

As nouns, oligosaccharide is a hypernym of disaccharide; that is, oligosaccharide is a word with a broader meaning than disaccharide:

disaccharide: any of a variety of carbohydrates that yield two monosaccharide molecules on complete hydrolysis
oligosaccharide: any of the carbohydrates that yield only a few monosaccharide molecules on complete hydrolysis

disaccharide (noun)	oligosaccharide (noun)
any of a variety of carbohydrates that yield two monosaccharide molecules on complete hydrolysis	any of the carbohydrates that yield only a few monosaccharide molecules on complete hydrolysis