auto-changer vs changer

auto-changer and changer both are nouns.

Word	Noun	Adjective	Verb	Adverb
auto-changer	Yes	No	No	No
changer	Yes	No	No	No

As nouns, auto-changer and changer are synonyms defined as:

auto-changer and changer: an automatic mechanical device on a record player that causes new records to be played without manual intervention

Other synonyms of auto-changer include record changer.

auto-changer (noun)	changer (noun)
an automatic mechanical device on a record player that causes new records to be played without manual intervention	an automatic mechanical device on a record player that causes new records to be played without manual intervention
	a person who changes something