null vs bugger all

null and bugger all both are nouns.

Word	Noun	Adjective	Verb	Adverb
null	Yes	Yes	No	No
bugger all	Yes	No	No	No

As nouns, bugger all is a hyponym of null; that is, bugger all is a word with a more specific, narrower meaning than null:

null: a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential
bugger all: little or nothing at all

Other hyponyms of null include nihil, Fanny Adams, fuck all, sweet Fanny Adams.

null (noun)	bugger all (noun)
a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential	little or nothing at all

null (adjective)	bugger all (adjective)
lacking any legal or binding force