each vs apiece

each is an adjective but apiece is not an adjective.

Word	Noun	Adjective	Verb	Adverb
each	No	Yes	No	Yes
apiece	No	No	No	Yes

As adverbs, each and apiece are synonyms defined as:

each and apiece: to or from every one of two or more (considered individually)

Other synonyms of each include for each one, from each one, to each one.

each (adjective)	apiece (adjective)
(used of count nouns) every one considered individually; quantifier, singular, universal pronoun; quantifier, singular, universal

each (adverb)	apiece (adverb)
to or from every one of two or more (considered individually)	to or from every one of two or more (considered individually)