jury vs special jury

jury and special jury both are nouns.

Word	Noun	Adjective	Verb	Adverb
jury	Yes	No	No	No
special jury	Yes	No	No	No

As nouns, special jury is a hyponym of jury; that is, special jury is a word with a more specific, narrower meaning than jury:

jury: a body of citizens sworn to give a true verdict according to the evidence presented in a court of law
special jury: a jury whose members are selected for special knowledge for a case involving complicated issues

Other hyponyms of jury include grand jury, hung jury, petit jury, petty jury, blue ribbon jury.

jury (noun)	special jury (noun)
a body of citizens sworn to give a true verdict according to the evidence presented in a court of law	a jury whose members are selected for special knowledge for a case involving complicated issues
a committee appointed to judge a competition