flap vs wave

flap and wave both are nouns.

Word	Noun	Adjective	Verb	Adverb
flap	Yes	No	Yes	No
wave	Yes	No	Yes	No

As nouns, wave is a hypernym of flap; that is, wave is a word with a broader meaning than flap:

Other hypernyms of flap include undulation.

As verbs, flap and wave are synonyms defined as:

flap and wave: move in a wavy pattern or with a rising and falling motion

Other synonyms of flap include roll, undulate.

flap (noun)	wave (noun)
any broad thin and limber covering attached at one edge; hangs loose or projects freely	a movement like that of a sudden occurrence or increase in a specified phenomenon
a movable airfoil that is part of an aircraft wing; used to increase lift or drag	a hairdo that creates undulations in the hair
a movable piece of tissue partly connected to the body	the act of signaling by a movement of the hand
the motion made by flapping up and down	(physics) a movement up and down or back and forth
an excited state of agitation	one of a series of ridges that moves across the surface of a liquid (especially across a large body of water)
	something that rises rapidly
	a persistent and widespread unusual weather condition (especially of unusual temperatures)
	an undulating curve

flap (verb)	wave (verb)
pronounce with a flap, of alveolar sounds	set waves in
make a fuss; be agitated	signal with the hands or nod
to flutter noisily when moved by the wind	move or swing back and forth
move in a wavy pattern or with a rising and falling motion	twist or roll into coils or ringlets
move with a flapping motion	move in a wavy pattern or with a rising and falling motion
move with a thrashing motion