virulent vs acerb

virulent and acerb both are adjectives.

Word	Noun	Adjective	Verb	Adverb
virulent	No	Yes	No	No
acerb	No	Yes	No	No

As adjectives, virulent and acerb are synonyms defined as:

Other synonyms of virulent include acerbic, acid, acrid, bitter, blistering, caustic, sulfurous, sulphurous, vitriolic.

virulent (adjective)	acerb (adjective)
infectious; having the ability to cause disease	sour or bitter in taste
extremely poisonous or injurious; producing venom	harsh or corrosive in tone
harsh or corrosive in tone