STUMPERS CXIII

Two seven-letter words differ by a single letter. The first three letters of both words are the same and in the same order. The last four letters of each word are words in their own right. The two letters that are different are K in one word and H in the other. What are the two words? 

HINTS:
#1: One of the words is of French origin.
#2: The first letter of both words is P. 

Answers:

PANCAKE
PANACHE