The noun that would take the place of the indefinite pronoun 'something' would depend on the context of the sentence; for example:
Instead of using I in a essay paper what word do you use?
or
Another word for resale is merchandising. Another word that you could use instead of resale is marketing. Resale is when one buys something to sell it.
I think you mean something like "What is the word for a word that we can use instead of another word, because it has nearly the same meaning, for example, suppose I want another word for 'dog', and I speak of a 'canine', or I want another word for 'shout' and I say 'yell'". The word for such a word is "synonym". We say that "yell" is a synonym for "shout" and of course, "shout" is a synonym for "yell".
function
Instead of using I in a essay paper what word do you use?
You can use the word "demanding" as a synonym for "challenging."
When writing a sentence it is best to use the word that makes the most sense. Did would be better in a place that you did something or asking a question. Had is stating something and not really best to use at the begining of a sentence.
Will, when, why, it, can
or
I think you mean something like "What is the word for a word that we can use instead of another word, because it has nearly the same meaning, for example, suppose I want another word for 'dog', and I speak of a 'canine', or I want another word for 'shout' and I say 'yell'". The word for such a word is "synonym". We say that "yell" is a synonym for "shout" and of course, "shout" is a synonym for "yell".
Another word for resale is merchandising. Another word that you could use instead of resale is marketing. Resale is when one buys something to sell it.
Grin, smirk, beam, and laugh are alternative words to use instead of smile.
mixture
I have a stomach ache.
Myself
are