soft drug vs hashish

soft drug and hashish both are nouns.

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

As nouns, hashish is a hyponym of soft drug; that is, hashish is a word with a more specific, narrower meaning than soft drug:

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

Other hyponyms of soft drug include bhang, cannabis, ganja, marihuana, marijuana, haschisch, hash, hasheesh.

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