breathing in vs aspiration

breathing in and aspiration both are nouns.

Word	Noun	Adjective	Verb	Adverb
breathing in	Yes	No	No	No
aspiration	Yes	No	No	No

As nouns, breathing in and aspiration are synonyms defined as:

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

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

breathing in (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 will to succeed
	a manner of articulation involving an audible release of breath
	a cherished desire