lamb vs Ovis aries

lamb and Ovis aries both are nouns.

Word	Noun	Adjective	Verb	Adverb
lamb	Yes	No	Yes	No
Ovis aries	Yes	No	No	No

lamb (noun)	Ovis aries (noun)
young sheep	any of various breeds raised for wool or edible meat or skin
the flesh of a young domestic sheep eaten as food
a sweet innocent mild-mannered person (especially a child)
a person easily deceived or cheated (especially in financial matters)

lamb (verb)	Ovis aries (verb)
give birth to a lamb