idea vs inspiration

idea and inspiration both are nouns.

Word	Noun	Adjective	Verb	Adverb
idea	Yes	No	No	No
inspiration	Yes	No	No	No

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

idea (noun)	inspiration (noun)
the content of cognition; the main thing you are thinking about	the act of inhaling; the drawing in of air (or other gases) as in breathing
your intention; what you intend to do	arousing to a particular emotion or action
an approximate calculation of quantity or degree or worth	a product of your creative thinking and work
a personal view	(theology) a special influence of a divinity on the minds of human beings
(music) melodic subject of a musical composition	a sudden intuition as part of solving a problem
	arousal of the mind to special unusual activity or creativity