doorknocker vs rapper

doorknocker and rapper both are nouns.

Word	Noun	Adjective	Verb	Adverb
doorknocker	Yes	No	No	No
rapper	Yes	No	No	No

As nouns, doorknocker and rapper are synonyms defined as:

doorknocker and rapper: a device (usually metal and ornamental) attached by a hinge to a door

Other synonyms of doorknocker include knocker.

doorknocker (noun)	rapper (noun)
a device (usually metal and ornamental) attached by a hinge to a door	a device (usually metal and ornamental) attached by a hinge to a door
	someone who performs rap music