empty vs meaningless

empty is a noun but meaningless is not a noun.

Word	Noun	Adjective	Verb	Adverb
empty	Yes	Yes	Yes	No
meaningless	No	Yes	No	No

empty (noun)	meaningless (noun)
a container that has been emptied

empty (adjective)	meaningless (adjective)
holding or containing nothing	having no meaning or direction or purpose
emptied of emotion	producing no result or effect
needing nourishment
devoid of significance or force

empty (verb)	meaningless (verb)
excrete or discharge from the body
become empty or void of its content
make void or empty of contents
remove the contents of a container
leave behind empty; move out of