To find out if a given name is reserved in Rails programmatically, check out this How to find out if a name is reserved in Rails 4.2.5. * ADDITIONAL_LOAD_PATHS * ARGF * ARGV * ActionController * ActionView * ActiveRecord * ArgumentError * Array * BasicSocket * Benchmark * Bignum * Binding * CGI * CGIMethods * CROSS_COMPILING * Class * ClassInheritableAttributes * Comparable * ConditionVariable * C