The answer is a relevant word or set of words.
The answer here is:
'#' - otherwise known as a POUND SIGN on telephone keypads in the United States (hence the title - although more on that later...).
To find this, we need to read the diagram as follows:
PAS (SAP, backwards)
INPUT ('a' here is the input for the function)
OASI ('OASIS' missing its final letter)
NO (element 102 in the Periodic Table is Nobelium, whose symbol is 'No')
SCAR (the villain from The Lion King)
UAS ('USA' with the second and third letters switched)
I (the square root of -1, censored here in the image, is known in mathematics as i)
NUMBER (a synonym of the final answer to the whole puzzle, which is what is pictured here)
NA (North America)
SINNER (i.e. 'not a saint')
ODAS (the letters of SODA rearranged as per the number ordering 2341)
INDEX (index finger)
TERS (letters 1, 2, 3 and 8 of TERmiteS)
A'S IN SQUARE (say what you see!)
IA (abbreviation for Iowa)
SI ('Yes' in Spanish)
NICE (Santa's 'nice' list)
GA (abbreviation for Georgia)
SING (say what you see!)
NAS (several North Americas)
INN (the inn in Bethlehem, approached by Mary and Joseph)
ANCY (CYAN - the colour shown here - with its halves exchanged)
string all of these letters together and respace appropriately to find the following text:
'P' as in 'PUT'
'O' as in 'OSCAR'
'U' as in 'UMBER'
'N' as in 'NERO'
'D' as in 'DEXTER'
'S' as in 'SQUARE'
'I' as in 'ICE'
'G' as in 'GRAM'
'N' as in 'NANCY'
What have we got here?
This is one side of a conversation someone might have on the phone in order to spell out the words 'POUND SIGN' - thereby providing a double-meaning to the title of this puzzle!
$\begingroup$ Great job! Although noting the clue for rot13('ahzore' vf npghnyyl n fvatyr punenpgre (thrff jung)) $\endgroup$ Mar 31, 2022 at 14:01
$\begingroup$ @Amoz That was the one image I wasn't sure about... I reasoned that it probably had the same number of letters as the clue two after it since its blank space was of the same length. I still don't really get what it should be (or why), tbh... $\endgroup$– StivMar 31, 2022 at 14:08
$\begingroup$ That picture looks familiar, where have you seen it before? $\endgroup$ Mar 31, 2022 at 17:24
$\begingroup$ @Amoz Ha, I do know what it is, just not how to describe it in a word beginning with what I need it to begin with :) $\endgroup$– StivMar 31, 2022 at 18:16
$\begingroup$ Ah but you already did. "The answer here is '?'".Might be a US synonym. $\endgroup$ Mar 31, 2022 at 19:14