Brilliantly constructed, and very interesting groups. I couldn't solve any of it even though I saw two links as soon as the grid appeared. The simple general knowledge group was totally unknown territory for me,and I don't really agree with the synonyms/definition group.

I agree - none of the words in the synonyms group are synonyms for "baffle", except for "boggle" maybe. Gawk and Gape mean to stare, marvel means to be filled with wonder.

Extremely excellent.