Rapidity adjectives are listed in this post. Each word below can often be found in front of the noun rapidity in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing RAPIDITY.
accelerated, alarming, amazing, appalling, astonishing, astounding, awful, bewildering, breathless, characteristic, comparative, considerable
dangerous, electric, enormous, equal, excessive, extraordinary, extreme, fearful, feverish, frightful, great, greater
greatest, immense, inconceivable, increased, increasing, incredible, intense, less, like, magical, marvellous, marvelous
miraculous, more, much, nervous, overwhelming, possible, prodigious, relative, remarkable, same, singular, startling
strange, such, sufficient, surprising, terrible, terrific, tremendous, uncommon, unexampled, unexpected, unparalleled, unprecedented
unusual, unwonted, usual, utmost, very, wonderful
Hope this word list had the adjective used with rapidity you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.