1. The same four letters, in the same order, will complete the words below.

_ _ V _ _
_ _ P _ _
_ _ B _ _

2. The same three letters, in the same order, will complete the words below:


CA _ _ _ H
EC _ _ _ SE
CA _ _ _ ER
F _ _ _ PANT

HINT:
1. The second and third missing letters are the same.
2)
#1. S_ _ _ ER could be added to the list.
#2 . TU _ _ _ could be added to the list.

Answers:

1. The letters are  REEL:

REVEL
REPEL
REBEL

2.  The letters are LIP:

CALIPH
ECLIPSE
CALIPER 
FLIPPANT 
(SLIPPER / TULIP)