code:Option Explicit
Sub GetAllWordsWithStyle()
Dim rng As Range
Dim itemlist As New Collection
Dim itm As Variant
For Each rng In ActiveDocument.Words
If rng.Style = "ACRONYM" Then
Debug.Print rng.Text
itemlist.Add rng.Text
End If
Next rng
Set rng = ActiveDocument.Range
rng.Collapse wdCollapseEnd
rng.InsertAfter vbCrLf & "Acronyms:"
For Each itm In itemlist
rng.Collapse wdCollapseEnd
rng.InsertAfter vbCrLf & itm
Next itm
End Sub