consumption vs sucking

consumption and sucking both are nouns.

Word	Noun	Adjective	Verb	Adverb
consumption	Yes	No	No	No
sucking	Yes	No	No	No

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

consumption: the process of taking food into the body through the mouth (as by eating)
sucking: the act of sucking

Other hyponyms of consumption include eating, feeding, deglutition, drink, swallow, suck, suction, drinking, imbibing, imbibition.

consumption (noun)	sucking (noun)
the act of consuming something	the act of sucking
the process of taking food into the body through the mouth (as by eating)
(economics) the utilization of economic goods to satisfy needs or in manufacturing
involving the lungs with progressive wasting of the body