Speeds adjectives are listed in this post. Each word below can often be found in front of the noun speeds in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing SPEEDS.
actual, amazing, average, broadband, certain, constant, current
different, equal, excessive, fast, faster, forward, great
greater, high, higher, highest, incredible, light, low
lower, maximum, moderate, normal, other, relative, relativistic
rotational, same, shutter, slow, slower, such, supersonic
top, variable, various, wind
Hope this word list had the adjective used with speeds you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.