• Topology Riddles
stretchy, bendy, pliable, morph, disentangle, genus, torus, donut, brainteaser, obligatory, bunch, intuition, Tara Holm, Lila Greco, societal, Vanessa Hill, swap
http://qindex.info/i.php?x=3716
• Landscapes and Drainage Patterns
plateau, plain, humid, arid, jagged, drainage, dentritic, radial, annular, bedrock, lush, relief, precipitation, abrasion
http://qindex.info/i.php?x=812