pennoncel vs streamer

pennoncel and streamer both are nouns.

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

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

Other hypernyms of pennoncel include pennant, pennon, waft.

pennoncel (noun)	streamer (noun)
a small pennant borne on a lance	long strip of cloth or paper used for decoration or advertising
	a long flag; often tapering
	a newspaper headline that runs across the full page
	light that streams