1. What do the following words have in common?

NEST
SEAT
LIFE
LETTER
HANDLE

2. What do the following words have in common?

VEST
TACT
JURY
VOICE
FANCY

Answers:

1. Each word is commonly preceded by LOVE.
2. Each word can be preceded by IN to make a new word.

Credits: Both puzzles:
LA Times Crossword
Sylvia Bursztyn and Barry Tunick

1. LOOKING FOR LOVE
2. IN ADDITION