rent collector vs gatherer

rent collector and gatherer both are nouns.

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

As nouns, gatherer is a hypernym of rent collector; that is, gatherer 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
gatherer: a person who is employed to collect payments (as for rent or taxes)

Other hypernyms of rent collector include accumulator, collector.

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