The difference between Offensive and Vulgar

When used as nouns, offensive means an attack, whereas vulgar means a common, ordinary person.

When used as adjectives, offensive means causing offense, whereas vulgar means debased, uncouth, distasteful, obscene.

check bellow for the other definitions of Offensive and Vulgar

Offensive as an adjective:

Causing offense; arousing a visceral reaction of disgust, anger, or hatred.

Examples:

"Some people find pornography offensive."
Offensive as an adjective:

Relating to an offense or attack, as opposed to defensive.

Examples:

"The army's offensive capabilities.'' ''An offensive weapon."
Offensive as an adjective (sports):

Having to do with play directed at scoring.

Examples:

"The offensive coordinator is responsible for ordering all rushing plays."

Offensive as a noun (countable, military):

An attack.

Examples:

"The Marines today launched a major offensive."
Offensive as a noun (uncountable):

The posture of attacking or being able to attack.

Examples:

"He took the offensive in the press, accusing his opponent of corruption."

Vulgar as an adjective:

Debased, uncouth, distasteful, obscene.
Vulgar as an adjective (classical sense):

Having to do with ordinary, common people.