lash out vs rubbish

lash out is not a noun while rubbish is a noun.

Word	Noun	Adjective	Verb	Adverb
lash out	No	No	Yes	No
rubbish	Yes	No	Yes	No

As verbs, rubbish is a hyponym of lash out; that is, rubbish is a word with a more specific, narrower meaning than lash out:

Other hyponyms of lash out include abuse, blackguard, clapperclaw, shout, claw, vitriol, rip, whang, barrage, bombard, blister, scald, scorch, whip.

lash out (noun)	rubbish (noun)
	nonsensical talk or writing
	worthless material that is to be disposed of

lash out (verb)	rubbish (verb)
attack in speech or writing	attack strongly