dust vs rubbish

dust and rubbish both are nouns.

Word	Noun	Adjective	Verb	Adverb
dust	Yes	No	Yes	No
rubbish	Yes	No	Yes	No

As nouns, rubbish is a hypernym of dust; that is, rubbish is a word with a broader meaning than dust:

Other hypernyms of dust include scrap, trash.

dust (noun)	rubbish (noun)
fine powdery material such as dry earth or pollen that can be blown about in the air	nonsensical talk or writing
the remains of something that has been destroyed or broken up	worthless material that is to be disposed of
free microscopic particles of solid material

dust (verb)	rubbish (verb)
remove the dust from	attack strongly
distribute loosely
rub the dust over a surface so as to blur the outlines of a shape
cover with a light dusting of a substance