Finding the longest word which is still a word with a character removed

py

import json 

# Dataset used https://github.com/dwyl/english-words/blob/master/words_dictionary.json

with open(r'path/to/words_dictionary.json') as f:
    words = json.load(f)

longest_len = 0
longest_word = ""

for word in words:
    length = len(word)

    if all(((word[:idx] + word[idx + 1:]) in words) for idx in range(length)) and length > longest_len:
        longest_len = length
        longest_word = word
        print(word)

print("Word: ",  longest_word)
print("Length: ", longest_len)