breath vs inspiration

breath and inspiration both are nouns.

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

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

breath: the process of taking in and expelling air during breathing
inspiration: the act of inhaling; the drawing in of air (or other gases) as in breathing

Other hyponyms of breath include breathing out, exhalation, expiration, aspiration, breathing in, inhalation, intake.

breath (noun)	inspiration (noun)
the process of taking in and expelling air during breathing	the act of inhaling; the drawing in of air (or other gases) as in breathing
an indirect suggestion	arousing to a particular emotion or action
a slight movement of the air	a product of your creative thinking and work
the air that is inhaled and exhaled in respiration	(theology) a special influence of a divinity on the minds of human beings
a short respite	a sudden intuition as part of solving a problem
	arousal of the mind to special unusual activity or creativity