"Quicker" and "more quickly" are both acceptable comparative forms of the adverb "quickly." However, as some of your grammar-savvy readers might think "quicker" is an error or too informal, you should opt for "more quickly" (unless your writing would really benefit from the flow of text offered by "quicker").

Is more faster grammatically correct?

Senior Member. Although "faster" is the superlative of "fast", the problem here is that technically, neither is correct. It should be "more quickly", since fast is an adjective and quickly is an adverb. However, "faster" is accepted speech, as people now use adjectives as adverbs in cases like these.

What can I say instead of more quickly?