elder vs presbyter

elder and presbyter both are nouns.

Word	Noun	Adjective	Verb	Adverb
elder	Yes	Yes	No	No
presbyter	Yes	No	No	No

As nouns, presbyter is a hyponym of elder; that is, presbyter is a word with a more specific, narrower meaning than elder:

elder (noun)	presbyter (noun)
a person who is older than you are	an elder in the Presbyterian Church
any of various church officers
any of numerous shrubs or small trees of temperate and subtropical Northern Hemisphere having white flowers and berrylike fruit

elder (adjective)	presbyter (adjective)
used of the older of two persons of the same name especially used to distinguish a father from his son