pack rat vs magpie

pack rat and magpie both are nouns.

Word	Noun	Adjective	Verb	Adverb
pack rat	Yes	No	No	No
magpie	Yes	No	No	No

As nouns, pack rat and magpie are synonyms defined as:

pack rat and magpie: someone who collects things that have been discarded by others

Other synonyms of pack rat include scavenger.

pack rat (noun)	magpie (noun)
any of several bushy-tailed rodents of the genus Neotoma of western North America; hoards food and other objects	long-tailed black-and-white crow that utters a raucous chattering call
someone who collects things that have been discarded by others	someone who collects things that have been discarded by others
	an obnoxious and foolish and loquacious talker