Find Words Starting In - Macro

I would love to be able to click on an assigned button in a new sheet, and a pop box appears.

Then I can type in a word, click find, and the macro will go through my whole list of keyword phrases and find all the words STARTING with the word chosen in the pop up box.

Yes, I could just sort from a-z, find the word, then copy and paste etc.
But I work with large lists sometimes, and its just so much easier to type the word, click find and the macro returns the list of just the phrases with the starting word I've chosen

As a note. I did put a post up a while ago which a coder called Jindon solved which works perfectly. (A great job by the grand master)
This macro finds the words ending with.
So, what I would really like is exactly the same macro, but it finds words at the start of a phrases not the end of a phrase.
I'll post Jindon's macro now

Sub Find_Words_Ending_In()
Dim sTime As Single, res As String, msg As String, x As Range
Range("c3:c" & Rows.Count).ClearContents
res = InputBox("Enter word to find")
If res = "" Then Exit Sub
sTime = Timer
On Error Resume Next................