Faster quicker

1. "faster" is the correct word. There seems to be no logical reason why "quicker" should not be okay, as it has a similar meaning, but it would not be used in this situation. Perhaps the reason is that "quicker" means faster, but it also has the implication of nimbleness, which doesn't fit with something like nail growth.

Thanks for this explanation. Do you mean that "quick" is only used for something that takes short period of time (seconds, fractions of a second) and therefore obviously the same applies to "quicker" and "quickest", whilst "fast" is much more flexible/relative and therefore is the only correct of these two to be used for actions that take months or years as "it grows fast/faster"?

alc241 This nail seems to grow faster/quicker than the rest. (how would you say this naturally please?)

Your sentence is natural as it stands. I would prefer to use faster here, though quicker is also correct.

Reason:
Quicker seems to be more spontaneous and animated to me. faster purely has a general sense of sp