attack vs bombard

attack and bombard both are nouns.

Word	Noun	Adjective	Verb	Adverb
attack	Yes	No	Yes	No
bombard	Yes	No	Yes	No

As verbs, bombard is a hyponym of attack; that is, bombard is a word with a more specific, narrower meaning than attack:

Other hyponyms of attack include abuse, blackguard, clapperclaw, shout, claw, vitriol, rip, whang, barrage, blister, scald, scorch, whip, rubbish.

As verbs, bombard is a hyponym of attack; that is, bombard is a word with a more specific, narrower meaning than attack:

attack: launch an attack or assault on; begin hostilities or start warfare with
bombard: throw bombs at or attack with bombs

attack (noun)	bombard (noun)
(military) an offensive against an enemy (using weapons)	a large shawm; the bass member of the shawm family
a decisive manner of beginning a musical tone or phrase
the act of attacking
ideas or actions intended to deal with a problem or situation
an offensive move in a sport or game
strong criticism
intense adverse criticism
the onset of a corrosive or destructive process (as by a chemical agent)
a sudden occurrence of an uncontrollable condition

attack (verb)	bombard (verb)
begin to injure	direct high energy particles or radiation against
set to work upon; turn one's energies vigorously to a task	address with continuously or persistently, as if with a barrage
attack in speech or writing	throw bombs at or attack with bombs
launch an attack or assault on; begin hostilities or start warfare with	cast, hurl, or throw repeatedly with some missile
take the initiative and go on the offensive
attack someone physically or emotionally