Delete List Contain Matching from Second List

[snb]

here you go:

list1: A10:A20
list2: B10:B20

Sub tst()
    [A10:A20] = [if(countif(A10:A20,B10:B20)>0,"",A10:A20)]
End Sub

as an arrayformula:

{=IF(COUNTIF(A10:A20;B10:B15)>0,"",A10:A20)}