Each word below can be changed in the same way to leave a new word. What change must be made and what are the new words?

MONTH

POISE 

ALIAS

TIMER

NIECE

LUNGE

HINT:

A letter has to be dropped from each word.

Answer:

 

The middle letter of each word can be dropped to leave a new word:

 

MONTH - MOTH

POISE  - POSE

ALIAS - ALAS

TIMER - TIER

NIECE - NICE

LUNGE - LUGE