headline vs dropline

headline and dropline both are nouns.

Word	Noun	Adjective	Verb	Adverb
headline	Yes	No	Yes	No
dropline	Yes	No	No	No

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

headline: the heading or caption of a newspaper article
dropline: a headline with the top line flush left and succeeding lines indented to the right

Other hyponyms of headline include drop line, stagger head, staggered head, stephead, stepped line, screamer, banner, streamer.

headline (noun)	dropline (noun)
the heading or caption of a newspaper article	a headline with the top line flush left and succeeding lines indented to the right

headline (verb)	dropline (verb)
publicize widely or highly, as if with a headline
provide (a newspaper page or a story) with a headline