It would depend on your requirements.
A thesarus tells you other adjectives so that you can find better things to write and a dictionary tells you the meanings or Definitions of words.
Of course.
A thesaurus - is a book of alternative words.
The internet is better than an encyclopedia simply because the internet contains more information and is always up to date.
Look it up in a Thesarus. My opinion is loose.
Thesauri or thesauruses is the plural of thesaurus. Both are acceptable
base, beggarly, cheap, derisory, invaluable, despicable
Yes, the online version of encyclopedia is better than its print edition, because they can add and update the articles.
It depends on how detailed you need the information.
according to meriam-websters thesarus online, "residential" is a like word.
gramatically yes or a robbress check the rogets thesarus or collective /gender nouns
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