functionality vs practicality

functionality and practicality both are nouns.

Word	Noun	Adjective	Verb	Adverb
functionality	Yes	No	No	No
practicality	Yes	No	No	No

As nouns, practicality is a hypernym of functionality; that is, practicality is a word with a broader meaning than functionality:

functionality: capable of serving a purpose well
practicality: concerned with actual use rather than theoretical possibilities

functionality (noun)	practicality (noun)
capable of serving a purpose well	concerned with actual use rather than theoretical possibilities