fullness vs satiation

fullness and satiation both are nouns.

Word	Noun	Adjective	Verb	Adverb
fullness	Yes	No	No	No
satiation	Yes	No	No	No

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

fullness: the condition of being filled to capacity
satiation: the state of being satisfactorily full and unable to take on more

Other hyponyms of fullness include repletion, satiety, excess, overabundance, surfeit, solidity, infestation.

fullness (noun)	satiation (noun)
greatness of volume	the act of achieving full gratification
the property of a sensation that is rich and pleasing	the state of being satisfactorily full and unable to take on more
the condition of being filled to capacity
completeness over a broad scope