Clearing Cells Containing Specified Words

I am trying to clear the contents of cells in a very large spread sheet containing certain words. I am running the following macro and it will only do the first part, so it will clear cells containing "deceased" but stops at "esa". There may be any number of other words or text in the cell and I want it to delete cells with "esa" by itself so for ex. not delete cell containing "vanesa". I am very amateur so I am sure this is something simple but I cannot find the answer or figure it out for myself.

Sub DeleteAll()
Dim lCount As Long
Dim rFoundCell As Range
Dim rLookRange As Range
Set rFoundCell = Range("A1")
Set rLookRange = ActiveSheet.UsedRange
For lCount = 1 To WorksheetFunction. CountIf(rLookRange, "*deceased")
Set rFoundCell = rLookRange.Find(What:="deceased", After:=rFoundCell, _
LookIn:=xlValues, LookAt:=xlPart, SearchOrder:=xlByRows, _
SearchDirection:=xlNext, MatchCase:=False)
rFoundCell.ClearContents.......................