notion vs effect

notion and effect both are nouns.

Word	Noun	Adjective	Verb	Adverb
notion	Yes	No	No	No
effect	Yes	No	Yes	No

As nouns, effect is a hyponym of notion; that is, effect is a word with a more specific, narrower meaning than notion:

Other hyponyms of notion include presence, first blush, hunch, intuition, suspicion.

notion (noun)	effect (noun)
(usually plural) small personal articles or clothing or sewing items	an outward appearance
a general inclusive concept	(of a law) having legal validity
an odd or fanciful or capricious idea	an impression (especially one that is artificial or contrived)
a vague idea in which some confidence is placed	the central meaning or theme of a speech or literary work
	a phenomenon that follows and is caused by some previous phenomenon
	a symptom caused by an illness or a drug

notion (verb)	effect (verb)
	produce
	act so as to bring into existence