Hi ITTransactionSoftwareChief. Nice list. The only additions I might suggest are the command variations:

Dictation Commands
Selection
Select <phrase>
Select all
Select document
Select word
Select previous word
Select next word
Select sentence
Select previous sentence
Select next sentence
Select paragraph
Select previous paragraph
Select next paragraph
Select previous
Select next
Deselect that
Deselect this
Unselect that
Unselect this
Clear selection
Navigation
Go to beginning
Move to beginning
Go to top
Move to top
Go to end
Move to end
Go to bottom
Move to bottom
Go to beginning of selection
Move to beginning of selection
Go to end of selection
Move to end of selection
Go to beginning of word
Move to beginning of word
Go to end of word
Move to end of word
Go to beginning of sentence
Move to beginning of sentence
Go to end of sentence
Move to end of sentence
Go to beginning of paragraph
Move to beginning of paragraph
Go to end of paragraph
Move to end of paragraph
Move left
Move right
Move up
Move down
Go to next field
Next field
Tab key
Go to previous field
Previous field
Scroll up
Scroll down
Scroll to top
Scroll to bottom
Press Escape key
Editing
Replace <phrase> with <phrase>
Change <phrase> to <phrase>
Undo that
Undo this
Scratch that
Redo that
Redo this
Cut that
Cut this
Cut selection
Copy that
Copy this
Copy selection
Paste that
Paste this
Paste here
Delete that
Delete this
Delete selection
Press Delete key
Press Backspace key
Capitalize that
Capitalize this
Capitalize selection
Capitalize <phrase>
Lowercase that
Lowercase this
Lowercase selection
Lowercase <phrase>
Uppercase that
Uppercase this
Uppercase selection
Uppercase <phrase>
Press Return key
Insert date
Literal <phrase>
Formatting
Bold that
Bold this
Bold selection
Bold phrase
Italicize that
Italicize this
Italicize selection
Italicize <phrase>
Underline that
Underline this
Underline selection
Underline <phrase>
System
Stop listening
Stop dictating
Show commands
Open commands
Show me what to say
Hide commands
Close commands
How do I <phrase>
Search commands for <phrase>
Search Spotlight for <phrase>
Open Dictation preferences
Open Speech preferences
Open Dictation and Speech preferences
Application
Switch to <application name>
Open <application name>
Launch <application name>
Show <application name>
Quit <application name>
Hide <application name>
Quit application
Hide application
Click <menu name> menu
Press <menu name> menu
Open <menu name> menu
Document
New item
Open document
Save document
Close window
Minimize window
Click <item name>
Press <item name>