There have been numerous other ones that I believe were spiritual words of knowledge that i wont get in to. (religion.blogs.cnn.com)
It is also, as mentioned, a deeply spiritual word. (gse.harvard.edu)
Many also use 1 Corinthians 2:12 - 13 to defend Inspiration, which talks about expressing spiritual truths with spiritual words taught not by human wisdom, but by the Spirit of God. (redeeminggod.com)