cloud vs dust cloud

cloud and dust cloud both are nouns.

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

As nouns, dust cloud is a hyponym of cloud; that is, dust cloud is a word with a more specific, narrower meaning than cloud:

cloud: any collection of particles (e.g., smoke or dust) or gases that is visible
dust cloud: a cloud of dust suspended in the air

Other hyponyms of cloud include coma, nebula, aerosol, cosmic dust, mushroom-shaped cloud, mushroom, mushroom cloud.

cloud (noun)	dust cloud (noun)
a group of many things in the air or on the ground	a cloud of dust suspended in the air
a visible mass of water or ice particles suspended at a considerable altitude
any collection of particles (e.g., smoke or dust) or gases that is visible
suspicion affecting your reputation
out of touch with reality
a cause of worry or gloom or trouble

cloud (verb)	dust cloud (verb)
colour with streaks or blotches of different shades
make milky or dull
make less clear
place under suspicion or cast doubt upon
make gloomy or depressed
billow up in the form of a cloud
make less visible or unclear
make overcast or cloudy