Cannabis sativa vs marihuana

Cannabis sativa and marihuana both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cannabis sativa	Yes	No	No	No
marihuana	Yes	No	No	No

As nouns, Cannabis sativa and marihuana are synonyms defined as:

Cannabis sativa and marihuana: a strong-smelling plant whose dried leaves can be smoked for a pleasant effect or pain reduction

Other synonyms of Cannabis sativa include ganja, marijuana.

Cannabis sativa (noun)	marihuana (noun)
a strong-smelling plant whose dried leaves can be smoked for a pleasant effect or pain reduction	the most commonly used illicit drug; considered a soft drug, it consists of the dried leaves of the hemp plant; smoked or chewed for euphoric effect
	a strong-smelling plant whose dried leaves can be smoked for a pleasant effect or pain reduction