honey eater vs honeysucker

honey eater and honeysucker both are nouns.

Word	Noun	Adjective	Verb	Adverb
honey eater	Yes	No	No	No
honeysucker	Yes	No	No	No

As nouns, honey eater and honeysucker are synonyms defined as:

honey eater and honeysucker: Australasian bird with tongue and bill adapted for extracting nectar

honey eater (noun)	honeysucker (noun)
Australasian bird with tongue and bill adapted for extracting nectar	Australasian bird with tongue and bill adapted for extracting nectar