sens vs ganja

sens and ganja both are nouns.

Word	Noun	Adjective	Verb	Adverb
sens	Yes	No	No	No
ganja	Yes	No	No	No

As nouns, ganja is a hypernym of sens; that is, ganja is a word with a broader meaning than sens:

sens: street names for marijuana
ganja: 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

Other hypernyms of sens include cannabis, marihuana, marijuana.

sens (noun)	ganja (noun)
street names for marijuana	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