sulfurous vs virulent

sulfurous and virulent both are adjectives.

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

As adjectives, sulfurous and virulent are synonyms defined as:

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

sulfurous (adjective)	virulent (adjective)
of or related to or containing sulfur or derived from sulfur	infectious; having the ability to cause disease
characterized by oppressive heat and humidity	extremely poisonous or injurious; producing venom
harsh or corrosive in tone	harsh or corrosive in tone