streamer vs headline

streamer and headline both are nouns.

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

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

Other hypernyms of streamer include newspaper headline.

streamer (noun)	headline (noun)
long strip of cloth or paper used for decoration or advertising	the heading or caption of a newspaper article
a long flag; often tapering
a newspaper headline that runs across the full page
light that streams

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