lactase vs disaccharidase

lactase and disaccharidase both are nouns.

Word	Noun	Adjective	Verb	Adverb
lactase	Yes	No	No	No
disaccharidase	Yes	No	No	No

As nouns, disaccharidase is a hypernym of lactase; that is, disaccharidase is a word with a broader meaning than lactase:

lactase: any of a group of enzymes (trade name Lactaid) that hydrolyze lactose to glucose and galactose
disaccharidase: an enzyme that catalyzes the hydrolysis of disaccharides into monosaccharides

lactase (noun)	disaccharidase (noun)
any of a group of enzymes (trade name Lactaid) that hydrolyze lactose to glucose and galactose	an enzyme that catalyzes the hydrolysis of disaccharides into monosaccharides