Nuaned Terms for Torah

In Psalm 19 and 119 there are multiple synonyms used for the Hebrew word "Torah". For example we see words
like "mitzvah" and "mishpat" in parallel used. I know that many will say these words are synonymous but
most would agree that even synonyms have a nuance difference in meaning. Does anyone know of a Christian or
Jewish source that explains the variation in meaning between these different words? 

shalom, brent emery