Thou adjectives are listed in this post. Each word below can often be found in front of the noun thou in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing THOU.
beautiful, calm, day, dead, dear
deep, earnest, fair, good, great
happy, hast, long, low, many
meanest, much, old, poor, pure
such, sweet, thinkest, vain, welcome
Hope this word list had the adjective used with thou you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.