decline vs dip

decline and dip both are nouns.

Word	Noun	Adjective	Verb	Adverb
decline	Yes	No	Yes	No
dip	Yes	No	Yes	No

As verbs, dip is a hyponym of decline; that is, dip is a word with a more specific, narrower meaning than decline:

Other hyponyms of decline include wear on, drop.

As verbs, dip is a hyponym of decline; that is, dip is a word with a more specific, narrower meaning than decline:

Other hyponyms of decline include sink.

decline (noun)	dip (noun)
a downward slope or bend	a brief swim in water
a gradual decrease; as of stored charge or current	a gymnastic exercise on the parallel bars in which the body is lowered and raised by bending and straightening the arms
change toward something smaller or lower	a candle that is made by repeated dipping in a pool of wax or tallow
a condition inferior to an earlier condition; a gradual falling off from a better state; decline	a sudden sharp decrease in some quantity
	a brief immersion
	tasty mixture or liquid into which bite-sized foods are dipped
	a thief who steals from the pockets or purses of others in public places
	(physics) the angle that a magnetic needle makes with the plane of the horizon
	a depression in an otherwise level surface

decline (verb)	dip (verb)
grow smaller	stain an object by immersing it in a liquid
grow worse	go down momentarily
show unwillingness towards	dip into a liquid while eating
inflect for number, gender, case, etc.	immerse briefly into a liquid so as to wet, coat, or saturate
go down	plunge (one's hand or a receptacle) into a container
fall in value	immerse in a disinfectant solution
not accept as true	scoop up by plunging one's hand or a ladle below the surface
	place (candle wicks) into hot, liquid wax
	dip into a liquid
	appear to move downward
	slope downwards
	lower briefly
	switch (a car's headlights) from a higher to a lower beam
	take a small amount from