coucal vs cuckoo

coucal and cuckoo both are nouns.

Word	Noun	Adjective	Verb	Adverb
coucal	Yes	No	No	No
cuckoo	Yes	No	Yes	No

As nouns, cuckoo is a hypernym of coucal; that is, cuckoo is a word with a broader meaning than coucal:

coucal: Old World ground-living cuckoo having a long dagger-like hind claw
cuckoo: any of numerous European and North American birds having pointed wings and a long tail

coucal (noun)	cuckoo (noun)
Old World ground-living cuckoo having a long dagger-like hind claw	any of numerous European and North American birds having pointed wings and a long tail
	a man who is a stupid incompetent fool

coucal (verb)	cuckoo (verb)
	repeat monotonously, like a cuckoo repeats his call