just vs rightful

just and rightful both are adjectives.

Word	Noun	Adjective	Verb	Adverb
just	No	Yes	No	Yes
rightful	No	Yes	No	No

just (adjective)	rightful (adjective)
used especially of what is legally or ethically right or proper or fitting	legally valid
fair to all parties as dictated by reason and conscience	having a legally established claim
free from favoritism or self-interest or bias or deception; conforming with established standards or rules
of moral excellence

just (adverb)	rightful (adverb)
and nothing more
only a moment ago
(used for emphasis) absolutely
only a very short time before
indicating exactness or preciseness
exactly at this moment or the moment described
possibly (indicating a slight chance of something being true)
by a little