drop line vs newspaper headline

drop line and newspaper headline both are nouns.

Word	Noun	Adjective	Verb	Adverb
drop line	Yes	No	No	No
newspaper headline	Yes	No	No	No

As nouns, newspaper headline is a hypernym of drop line; that is, newspaper headline is a word with a broader meaning than drop line:

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

Other hypernyms of drop line include headline.

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