aspirate vs suck in

aspirate is a noun but suck in is not a noun.

Word	Noun	Adjective	Verb	Adverb
aspirate	Yes	No	Yes	No
suck in	No	No	Yes	No

aspirate (noun)	suck in (noun)
a consonant pronounced with aspiration
a speech sound having as an obvious concomitant an audible puff of breath, as initial stop consonants or initial h -sounds.

aspirate (verb)	suck in (verb)
inhale (air, water, etc.)	take up as if with a sponge
pronounce with aspiration; of stop sounds	draw in as if by suction
remove by suction	attract by using an inexorable force, inducement, etc.