Is there a way to search and replace text in bounding boxes?

Adobe properly created a form from a Word document.  It used the text in the original Word document to create nice and accurate fillable fields in the new PDF and all looks correct.

Now I would like to programmatcally change some of the 'titles' that precede the fillable fields. (It was these titles from which the fillable-field names were created) in order to give the title a friendlier name. I know how to cycle through the fillable-field names and change them at will, but is there a way to cycle through the 'titles'? (I can get to these titles chosing to 'Edit PDF' (and showing the bounding boxes, but not sure if this step is needed). I can also manually search for text snippets using CTRL-F, and I successfully replace text that is found one item at a time. Can I automate this 'find' and 'replace' routine.