duster vs dust storm

duster and dust storm both are nouns.

Word	Noun	Adjective	Verb	Adverb
duster	Yes	No	No	No
dust storm	Yes	No	No	No

As nouns, duster and dust storm are synonyms defined as:

Other synonyms of duster include sandstorm, sirocco.

duster (noun)	dust storm (noun)
a pitch thrown deliberately close to the batter	a windstorm that lifts up clouds of dust or sand
a loose coverall (coat or frock) reaching down to the ankles
a piece of cloth used for dusting
a windstorm that lifts up clouds of dust or sand