infestation vs fullness

infestation and fullness both are nouns.

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

As nouns, fullness is a hypernym of infestation; that is, fullness is a word with a broader meaning than infestation:

infestation (noun)	fullness (noun)
a swarm of insects that attack plants	greatness of volume
the state of being invaded or overrun by parasites	the property of a sensation that is rich and pleasing
	the condition of being filled to capacity
	completeness over a broad scope