ganja vs Cannabis sativa

ganja and Cannabis sativa both are nouns.

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

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

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

Other synonyms of ganja include marihuana, marijuana.

ganja (noun)	Cannabis sativa (noun)
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
a strong-smelling plant whose dried leaves can be smoked for a pleasant effect or pain reduction