mouthful vs containerful

mouthful and containerful both are nouns.

Word	Noun	Adjective	Verb	Adverb
mouthful	Yes	No	No	No
containerful	Yes	No	No	No

As nouns, containerful is a hypernym of mouthful; that is, containerful is a word with a broader meaning than mouthful:

mouthful (noun)	containerful (noun)
a small amount eaten or drunk	the quantity that a container will hold
the quantity that can be held in the mouth