Really is an adverb, and it modifies other adverbs, verbs, or adjectives. It has a meaning of "very." ... Real is an adjective, and can be used to modify nouns or noun phrases. It has a meaning of "true or genuine."

Are really and very adverbs?

REALLY: An adverb, which means that it's used to describe adjectives, verbs, or other adverbs. VERY: An adverb, but with one hitch - it cannot modify verbs. ... Really and Very can be interchangeable when they both modify an adjective.

Is really nice an adverb?

Really can be used in the following ways: as an adverb (with a verb): Do you really love her? (before an adjective or adverb): She's a really nice person. ... as a sentence adverb (making a comment on the whole sentence or clause): Really, it isn't important. as an interjection: 'I don't care what you think.