Loop adjectives are listed in this post. Each word below can often be found in front of the noun loop in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing LOOP.
back, big, bottom, circular, closed, complete, constant, continuous, current, double, easy, endless
entire, event, extra, extracellular, feedback, final, first, following, foreach, full, gold, great
infinite, inner, intracellular, large, last, little, local, locked, long, loose, lower, main
metal, mile, minute, narrow, nested, new, next, open, other, outer, paved, phonological
recursive, right, same, scenic, second, shaped, short, simple, single, small, smaller, third
tight, top, upper, vertical, video, volume, whole, wide
Hope this word list had the adjective used with loop you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.