rent collector vs accumulator

rent collector and accumulator both are nouns.

Word	Noun	Adjective	Verb	Adverb
rent collector	Yes	No	No	No
accumulator	Yes	No	No	No

As nouns, accumulator is a hypernym of rent collector; that is, accumulator is a word with a broader meaning than rent collector:

rent collector: a person who goes from house to house collecting rents for the owner
accumulator: a person who is employed to collect payments (as for rent or taxes)

Other hypernyms of rent collector include collector, gatherer.

rent collector (noun)	accumulator (noun)
a person who goes from house to house collecting rents for the owner	a voltaic battery that stores electric charge
	(computer science) a register that has a built-in adder that adds an input number to the contents of the register
	a person who is employed to collect payments (as for rent or taxes)