The following word pairs each share a common relationship. Can you determine what it is?

1. PER - ROT
2. LEG - NET
3. DIE - ION
4. SPY - ORE
5. CUB - LIP

HINT:
It happens when the letters of the two words in each pair are combined.

Answer:

When the letters of the two words in each pair are combined, they can be rearranged to spell a common word:

1. PER + ROT = REPORT
2. LEG + NET = GENTLE
3. DIE + ION = IODINE
4. SPY + ORE = OSPREY
5. CUB + LIP = PUBLIC