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Rails Reserved Words

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This list is from the Cheat Sheets site, and probably from the 2.x era, and there's a distinct lack of newer canonical references for this simple question. Please add or edit as you see fit. I will sort the list once a day.

• ADDITIONAL_LOAD_PATHS
• ARGF
• ARGV
• ActionController
• ActionView
• ActiveRecord
• ArgumentError
• Array
• BasicSocket
• Benchmark
• Bignum
• Binding
• CGI
• CGIMethods
• CROSS_COMPILING
• Class
• ClassInheritableAttributes
• Comparable
• ConditionVariable
• Config
• Continuation
• DRb
• DRbIdConv
• DRbObject
• DRbUndumped
• Data
• Date
• DateTime
• Delegater
• Delegator
• Digest
• Dir
• ENV
• EOFError
• ERB
• Enumerable
• Errno
• Exception
• FALSE
• FalseClass
• Fcntl
• File
• FileList
• FileTask
• FileTest
• FileUtils
• Fixnum
• Float
• FloatDomainError
• GC
• Gem
• GetoptLong
• Hash
• IO
• IOError
• IPSocket
• IPsocket
• IndexError
• Inflector
• Integer
• Interrupt
• Kernel
• LN_SUPPORTED
• LoadError
• LocalJumpError
• Logger
• Marshal
• MatchData
• MatchingData
• Math
• Method
• Module
• Mutex
• Mysql
• MysqlError
• MysqlField
• MysqlRes
• NIL
• NameError
• NilClass
• NoMemoryError
• NoMethodError
• NoWrite
• NotImplementedError
• Numeric
• OPT_TABLE
• Object
• ObjectSpace
• Observable
• Observer
• PGError
• PGconn
• PGlarge
• PGresult
• PLATFORM
• PStore
• ParseDate
• Precision
• Proc
• Process
• Queue
• RAKEVERSION
• RELEASE_DATE
• RUBY
• RUBY_PLATFORM
• RUBY_RELEASE_DATE
• RUBY_VERSION
• Rake
• RakeApp
• RakeFileUtils
• Range
• RangeError
• Rational
• Regexp
• RegexpError
• Request
• RuntimeError
• STDERR
• STDIN
• STDOUT
• ScanError
• ScriptError
• SecurityError
• Signal
• SignalException
• SimpleDelegater
• SimpleDelegator
• Singleton
• SizedQueue
• Socket
• SocketError
• StandardError
• String
• StringScanner
• Struct
• Symbol
• SyntaxError
• SystemCallError
• SystemExit
• SystemStackError
• TCPServer
• TCPSocket
• TCPserver
• TCPsocket
• TOPLEVEL_BINDING
• TRUE
• Task
• Text
• Thread
• ThreadError
• ThreadGroup
• Time
• Transaction
• TrueClass
• TypeError
• UDPSocket
• UDPsocket
• UNIXServer
• UNIXSocket
• UNIXserver
• UNIXsocket
• UnboundMethod
• Url
• VERSION
• Verbose
• YAML
• ZeroDivisionError
• type

###Common Gems Reserved Words

Please add another list for words reserved by a particular Gem.