Radius adjectives are listed in this post. Each word below can often be found in front of the noun radius in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing RADIUS.
atomic, average, block, certain, common, considerable, constant, convenient, corresponding, critical, different
distal, effective, equal, equatorial, external, finite, fixed, focal, foot, greater, hydraulic
hydrodynamic, inch, infinite, initial, inner, inside, internal, ionic, kilometer, large, larger
least, limited, long, maximum, mean, mile, minimum, narrow, new, orbital, other
outer, outside, polar, pore, positive, proximal, required, same, short, shorter, small
smaller, smallest, spectral, variable, wide, yard
Hope this word list had the adjective used with radius you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.