Parallel adjectives are listed in this post. Each word below can often be found in front of the noun parallel in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing PARALLEL.
adequate, appropriate, centre, certain, clear, close, closest, complete, contemporary, curious, deadly, direct
eighth, elaborate, exact, explicit, fifth, first, following, fortieth, general, good, historic, historical
human, important, ingenious, instructive, interesting, intriguing, less, literary, modern, more, nearest, ninth
obvious, only, other, partial, perfect, possible, precise, proper, real, remarkable, rough, same
second, seventeenth, seventh, significant, similar, singular, sixth, strange, strict, striking, strong, structural
suggestive, tangent, third, true, useful, verbal
Hope this word list had the adjective used with parallel you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.