backgrounder vs news conference

backgrounder and news conference both are nouns.

Word	Noun	Adjective	Verb	Adverb
backgrounder	Yes	No	No	No
news conference	Yes	No	No	No

As nouns, news conference is a hypernym of backgrounder; that is, news conference is a word with a broader meaning than backgrounder:

backgrounder: a press conference or interview in which a government official explains to reporters the background of an action or policy
news conference: a conference at which press and tv reporters ask questions of a politician or other celebrity

Other hypernyms of backgrounder include press conference.

backgrounder (noun)	news conference (noun)
a press conference or interview in which a government official explains to reporters the background of an action or policy	a conference at which press and tv reporters ask questions of a politician or other celebrity