legal expert vs expert

legal expert and expert both are nouns.

Word	Noun	Adjective	Verb	Adverb
legal expert	Yes	No	No	No
expert	Yes	Yes	No	No

As nouns, expert is a hypernym of legal expert; that is, expert is a word with a broader meaning than legal expert:

legal expert (noun)	expert (noun)
a legal scholar versed in civil law or the law of nations	a person with special knowledge or ability who performs skillfully

legal expert (adjective)	expert (adjective)
	having or showing knowledge and skill and aptitude
	of or relating to or requiring special knowledge to be understood