spisok = list()
spisok.append('word')
string = 'word in world'
if 'слово из списка' in string:
print ('yes)
text = 'The quick brown fox jumps over the lazy dog'
checklist = {'fox', 'dog', 'cat'}
common_words = set(text.split()) & checklist
print(common_words)
{'fox', 'dog'}