dust-covered vs dusty

dust-covered and dusty both are adjectives.

Word	Noun	Adjective	Verb	Adverb
dust-covered	No	Yes	No	No
dusty	No	Yes	No	No

As adjectives, dust-covered and dusty are synonyms defined as:

dust-covered (adjective)	dusty (adjective)
covered with a layer of dust	covered with a layer of dust
	lacking originality or spontaneity; no longer new