lash out vs assail

lash out and assail both are verbs.

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

As verbs, lash out and assail are synonyms defined as:

Other synonyms of lash out include assault, attack, round, snipe.

lash out (verb)	assail (verb)
attack in speech or writing	attack in speech or writing
	attack someone physically or emotionally
	launch an attack or assault on; begin hostilities or start warfare with