With generous from Sanskrit, it is possible to coin (reasonably long) words which contain only one or two alphabets.
കാകാകാരം = കാക + ആകാരം (in the shape of a crow)
പാപാപാരം = പാപ + അപാരം (sea of sin)
(These words explain the title - aaab words :-)
Can you think of some more?
By the way, you can also use mallu roots for such words. e.g.
നാനാനനന്് = നാന് + ആനനന് (four faced) = Brahma