extra vs thespian

extra and thespian both are nouns.

Word	Noun	Adjective	Verb	Adverb
extra	Yes	Yes	No	Yes
thespian	Yes	Yes	No	No

As nouns, thespian is a hypernym of extra; that is, thespian is a word with a broader meaning than extra:

Other hypernyms of extra include actor, histrion, player, role player.

extra (noun)	thespian (noun)
something additional of the same kind	a theatrical performer
an additional edition of a newspaper (usually to report a crisis)
a minor actor in crowd scenes

extra (adjective)	thespian (adjective)
further or added	of or relating to drama
more than is needed, desired, or required
added to a regular schedule

extra (adverb)	thespian (adverb)
unusually or exceptionally