Picus viridis vs pecker

Picus viridis and pecker both are nouns.

Word	Noun	Adjective	Verb	Adverb
Picus viridis	Yes	No	No	No
pecker	Yes	No	No	No

As nouns, pecker is a hypernym of Picus viridis; that is, pecker is a word with a broader meaning than Picus viridis:

Picus viridis: woodpecker of Europe and western Asia
pecker: bird with strong claws and a stiff tail adapted for climbing and a hard chisel-like bill for boring into wood for insects

Other hypernyms of Picus viridis include peckerwood, woodpecker.

Picus viridis (noun)	pecker (noun)
woodpecker of Europe and western Asia	bird with strong claws and a stiff tail adapted for climbing and a hard chisel-like bill for boring into wood for insects
	horny projecting mouth of a bird
	obscene terms for penis