Search and Replace a string t-SQL

Question

Everyone I am trying to write a query to replace all occurrences of a string at the end. I have some noise words(104 to be exact) that need to be removed from the string if they appear at the end.
Two noise words for example are --Company, LLC
Here are some examples and expected output:
American Company, LLC --Expected output --American (both noise words should be removed)
American LLC,LLC --Expected output -- American
American Company American Company-- American Company American (one noise word occurs in between other words, so it should not be removed)
currently I have this query:
DECLARE @NEWSTRING VARCHAR(max)
DECLARE @NEWSTRINGlength nvarchar(max)
SET @NEWSTRING = 'American Company American Company Company, LLC LLC' ;
SET @NEWSTRINGlength = len(@newstring)
SELECT @NEWSTRINGlength
CREATE TABLE #item (item Nvarchar(250) null)
INSERT INTO #item
SELECT 'Company' as item
UNION ALL
SELECT 'LLC' as item
DECLARE @unwantedCharecters VARCHAR(50) = '%[~,@,#,$,%,&,*,(,),.,!, ]%'
WHILE PATINDEX( @unwantedCharecters, @NEWSTRING ) > 0
SELECT @NEWSTRING = ltrim(rtrim(Replace(REPLACE( @NEWSTRING, SUBSTRING( @NEWSTRING, PATINDEX( @unwantedCharecters, @NEWSTRING ), 1 ),''),'-',' ')))
SELECT @NEWSTRING = substring(rtrim(@NEWSTRING), 1, len(@newstring) - len(ITEM)) FROM #item WHERE rtrim(@NEWSTRING) LIKE '%' + ITEM
Each occurrence of the noise word should be removed, unless they appear in between other words.

Answer 1

Here's how I'd do it...
1) If you don't have a sting splitting function, create one. (I can supply code if needed)
2) Use the function to split the string into a table , using spaces as a delimiter. 
'American Company American Company Company, LLC LLC' would look like this...
StringID Word Position
1 American 1
1 Company 2
1 American 3
1 Company 4
1 Company, 5
1 LLC 6
1 LLC 7
3) Do the same with your "noise word" list
4) Left join the "SplitNoiseWord" table to your "SplitCompName" table.
5) Find the last occurrence of a NULL match for each StringID (max Position where SNW is NULL)  and delete everything after that.
6) Use FOR XML PATH to reassemble the strings, using a space as a delimiter.
HTH,
Jason
Jason Long