Subscription
Using the same Su and changing the rest, by backspacing from the end and then typing after the Su. Both have wavy red lines:
Subway
Summer
Just backspacing from the end, using the error-containing word:
Subscription
Subscriptio – now the wavy red line is under only the Su
Subscripti – same, just the Su, even though this is clearly a misspelled word
Subscript – same
Subscrip – same
Subscri – same
Subscr – same
Subsc – same
Subs – same
Su – same
Su – continuing to backspace, with the Su underlined in wavy red: I backspaced through four invisible characters between the b and the u before the cursor moved to the u and the wavy line disappeared.
I don’t know how to see what’s in there, but something is in there.
That’s it. Stopping now. Stopping.