Dictionary.com
Thesaurus.com

-atic

American  
  1. a suffix used in forming adjectives from verbs and nouns: aquatic, enzymatic .


-atic British  

suffix

  1. of the nature of the thing specified

    problematic

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of -atic

From Latin -āticus. See -ate 1 ( def. ), -ic ( def. )