Nouns

(n)captiontaking exception; especially a quibble based on a captious argument“a mere caption unworthy of a reply”
(n)subtitle, captiontranslation of foreign dialogue of a movie or TV program; usually displayed at the bottom of the screen
(n)caption, legendbrief description accompanying an illustration

Verbs

(v)captionprovide with a caption, as of a photograph or a drawing