Level 712 - 4 Letters

Here's the 4 letter solution for Level 712 in 4 Pics 1 Word

4 pics 1 Word Level 712 Image 1 4 pics 1 Word Level 712 Image 2 4 pics 1 Word Level 712 Image 3 4 pics 1 Word Level 712 Image 4
Z
O
O
M