inhalation vs aspiration

inhalation and aspiration both are nouns.

Word	Noun	Adjective	Verb	Adverb
inhalation	Yes	No	No	No
aspiration	Yes	No	No	No

As nouns, inhalation and aspiration are synonyms defined as:

inhalation and aspiration: the act of inhaling; the drawing in of air (or other gases) as in breathing

Other synonyms of inhalation include breathing in, inspiration, intake.

inhalation (noun)	aspiration (noun)
the act of inhaling; the drawing in of air (or other gases) as in breathing	the act of inhaling; the drawing in of air (or other gases) as in breathing
a medication to be taken by inhaling it	a will to succeed
	a manner of articulation involving an audible release of breath
	a cherished desire