Phases adjectives are listed in this post. Each word below can often be found in front of the noun phases in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing PHASES.
active, acute, additional, advanced, aqueous, basic, best, broad, certain, characteristic, chief, chronic, clinical, common, complementary, complex, condensed, consecutive, continuous, corresponding, critical, crystal, crystalline, curious, developmental
different, difficult, discrete, distinct, distinctive, diverse, earlier, earliest, early, economic, essential, evolutionary, experimental, few, final, first, fluid, following, fundamental, future, gaseous, general, great, higher, highest
historical, important, individual, initial, intellectual, interesting, intermediate, key, larger, last, late, later, latest, latter, legal, lighter, liquid, lower, lunar, main, major, manic, manifold, many, marked
mental, mere, minor, mobile, modern, moon, more, most, multiple, natural, necessary, negative, new, next, normal, numerous, only, operational, opposite, organic, other, overlapping, particular, past, peculiar
political, possible, practical, preceding, preliminary, present, previous, primary, primitive, principal, progressive, recent, relative, religious, remarkable, respective, same, second, secondary, separate, sequential, serious, several, significant, similar
single, social, solid, special, specific, spiritual, stationary, strange, striking, subsequent, successive, such, technical, temporal, temporary, third, transient, transitional, typical, varied, various, worst
Hope this word list had the adjective used with phases you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.