delayer vs filibuster

delayer and filibuster both are nouns.

Word	Noun	Adjective	Verb	Adverb
delayer	Yes	No	No	No
filibuster	Yes	No	Yes	No

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

delayer: a person who delays; to put off until later or cause to be late
filibuster: a legislator who gives long speeches in an effort to delay or obstruct legislation that he (or she) opposes

Other hyponyms of delayer include filibusterer, cunctator, postponer, procrastinator, temporiser, temporizer.

delayer (noun)	filibuster (noun)
a person who delays; to put off until later or cause to be late	(law) a tactic for delaying or obstructing legislation by making long speeches
	a legislator who gives long speeches in an effort to delay or obstruct legislation that he (or she) opposes

delayer (verb)	filibuster (verb)
	obstruct deliberately by delaying