sapsucker vs pecker

sapsucker and pecker both are nouns.

Word	Noun	Adjective	Verb	Adverb
sapsucker	Yes	No	No	No
pecker	Yes	No	No	No

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

sapsucker: small American woodpecker that feeds on sap from e.g. apple and maple trees
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 sapsucker include peckerwood, woodpecker.

sapsucker (noun)	pecker (noun)
small American woodpecker that feeds on sap from e.g. apple and maple trees	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