I agree with Rat - while there are some words/phrases which are always unacceptable for the Archive, there are others which are fine in some circumstances but not others (eg breast, which could be used in a variety of contexts and not always the one which first comes to mind), and others which are just about acceptable in very small doses (eg the example Wanda asked about in the first post on the thread).
And sometimes it's perfectly innocuous words, but the context makes them completely unacceptable!
Take my word for it: as someone who has GEd plenty of nfic to PG-13 conversions, and also converted some of my own stories, it's nothing near as simple as having a list I could consult - I wish!!
But, as both Kathy and LabRat have said, if you have a specific query, just ask; you'll find several of us able and willing to help.
Wendy
