From the English Grammar Rule Book:
"Capitalize proper nouns -
A proper noun is the special noun or name used for a specific person, place, company, or other thing. Proper nouns should always be capitalized."
"Dictionary" is the name of a specific book.
According to Webster's Dictionary godson should NOT be capitalized.
Some words need to be capitalized; others do not. For every word to be capitalized in a dictionary would be confusing because one would not know which words they would need to capitalize in everyday usage.
acronyms
Yes, "I am" is typically capitalized because "I" is a pronoun and should always be capitalized in English.
Yes, it should be capitalized and underlined because it is a published work.
Yes, when referring to the title of the President of the United States, it should always be capitalized.
Yes. Days of the week are always capitalized.
No it is not. If you look it up in a dictionary it will tell you it is not capitalized.
No, circa does not need to be capitalized.
Yes, it should always be capitalized.
No, the word "rif" is not always capitalized. It should only be capitalized if it is part of a proper noun or at the beginning of a sentence.
Yes it should always be capitalized.