Level 1003 - 4 Letters

Here's the 4 letter solution for Level 1003 in 4 Pics 1 Word

4 pics 1 Word Level 1003 Image 1 4 pics 1 Word Level 1003 Image 2 4 pics 1 Word Level 1003 Image 3 4 pics 1 Word Level 1003 Image 4
R
U
S
H