teaspoon vs containerful

teaspoon and containerful both are nouns.

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

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

teaspoon (noun)	containerful (noun)
a small spoon used for stirring tea or coffee; holds about one fluid dram	the quantity that a container will hold
as much as a teaspoon will hold