hash vs soft drug

hash and soft drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
hash	Yes	No	Yes	No
soft drug	Yes	No	No	No

As nouns, soft drug is a hypernym of hash; that is, soft drug is a word with a broader meaning than hash:

hash: purified resinous extract of the hemp plant; used as a hallucinogen
soft drug: a drug of abuse that is considered relatively mild and not likely to cause addiction

hash (noun)	soft drug (noun)
purified resinous extract of the hemp plant; used as a hallucinogen	a drug of abuse that is considered relatively mild and not likely to cause addiction
chopped meat mixed with potatoes and browned

hash (verb)	soft drug (verb)
chop up