This 11x11 "word" square sometimes uses phrases, crossword style, rather than full words only. Perhaps readers can generate other examples. The definitions also work for the down entries of course, and we would welcome large squares, with no blacks, that had different words going down than across.
"A Crossword Puzzle Square,"
Word Ways: Vol. 40
, Article 5.
Available at: http://digitalcommons.butler.edu/wordways/vol40/iss3/5