The correct spelling is "unnoticed" (not seen).
You can spell it Tom, Tommy, Thomas, or Tommie. I have seen Thom.
I have seen it spelled Chayse.
guess your best guess
This is the only way that I have ever seen Brent spelled.
visto
The correct spelling is "unnoticed" (not seen).
You can spell it Tom, Tommy, Thomas, or Tommie. I have seen Thom.
vu (Got it from Google Translate)
That is the correct spelling of "retrospectively" (seen in hindsight).
The word sought may be "observable" (able to be seen).
I have seen it spelled Chayse.
guess your best guess
Although it is seen hyphenated, the spelling "nonbusiness" is acceptable.
This is the only way that I have ever seen Brent spelled.
That is the correct spelling of "unprecedented" (unique, never seen before).
The correct spelling is superseded, although it is widely seen as superceded.