Words that are also hex numbers

hex-and-word.py

import re 

def is_hex(word):
    match = re.match("^[a-f]*$", word)
    return match is not None

with open('/usr/share/dict/american-english') as file:
    lines = file.readlines()
for item in lines:
    if is_hex(item.lower()) and len(item)>2:
        print(item)