amicus curiae vs consultant

amicus curiae and consultant both are nouns.

Word	Noun	Adjective	Verb	Adverb
amicus curiae	Yes	No	No	No
consultant	Yes	No	No	No

As nouns, consultant is a hypernym of amicus curiae; that is, consultant is a word with a broader meaning than amicus curiae:

amicus curiae: an adviser to the court on some matter of law who is not a party to the case; usually someone who wants to influence the outcome of a lawsuit involving matters of wide public interest
consultant: an expert who gives advice

Other hypernyms of amicus curiae include adviser, advisor.

amicus curiae (noun)	consultant (noun)
an adviser to the court on some matter of law who is not a party to the case; usually someone who wants to influence the outcome of a lawsuit involving matters of wide public interest	an expert who gives advice