lactase vs Lactaid

lactase and Lactaid both are nouns.

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

As nouns, lactase and Lactaid are synonyms defined as:

lactase and Lactaid: any of a group of enzymes (trade name Lactaid) that hydrolyze lactose to glucose and galactose

lactase (noun)	Lactaid (noun)
any of a group of enzymes (trade name Lactaid) that hydrolyze lactose to glucose and galactose	any of a group of enzymes (trade name Lactaid) that hydrolyze lactose to glucose and galactose