rent collector vs collector

rent collector and collector both are nouns.

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

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

Other hypernyms of rent collector include accumulator, gatherer.

rent collector (noun)	collector (noun)
a person who goes from house to house collecting rents for the owner	the electrode in a transistor through which a primary flow of carriers leaves the region between the electrodes
	a crater that has collected cosmic material hitting the earth
	a person who is employed to collect payments (as for rent or taxes)
	a person who collects things