import re
all_domain=['com edu','.com edu','inc.', '.com', 'inc', 'com', '.edu', 'edu']
all_domain.sort(key=len, reverse=True)
domain_alternators = '|'.join(map(re.escape,all_domain)) # <-- HERE
 
print(domain_alternators)
regex = re.compile(r'(?<!\w)({}|[a-z-A-Z]+)(?!\w)'.format(domain_alternators))  # <-- HERE
print(regex)
#re.compile('\\b(.com edu|com edu|inc.|.com|.edu|inc|com|edu|[a-z-A-Z]+)\\b')
 
name= 'BASIC SCHOOL DISTRICT .COM'
result=regex.findall(name.lower())
print(result)

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