Complete the Word Squares

Fill in the remaining letters in the following word squares so that each row forms a word and each column forms a word. More than one answer may be possible.

1.

P _ _ _ _ G _ _ _ _ U _ _ _ _ N

2.

P _ _ _ _ I _ _ _ _ E _ _ _ _ Y

3.

C _ _ _ _ E _ _ _ _ G _ _ _ _ P

4.

T _ _ _ _ _ U _ _ _ _ _ N _ _ _ _ _ N _ _ _ _ _ S

Carl G.

[rot-13'd to avoid spoilers]

1.

C B G F B T E R G E H R F R R A

2.

C Y B Q Y V Z R B Z R A Q R A L

3.

P U H O U R E R H E T R O R R C

4.

G B N F G B H A P R N A A R K F P R A G G R K G F

Now that I have a seemingly unlimited supply of them, here's a larger word square to complete:

S _ _ _ _ _ _ U _ _ _ _ _ _ E _ _ _ _ _ _ D _ _ _ _ _ _ E _ _ _ _ _ _ S

All words checked out with webster, but *not* all are in my cryptogram

The former is likely intended as a plural of 'nzrag' or perhaps 'nzraghz', though M-W online insists the plural is 'nzragf'. I don't know about 'uhzvfz', though perhaps it refers to the philosophy adhered to by followers of Qniq Uhzr.

wrote [rot13 in case anyone still wants to solve them]

Is nzragn a word? It's in one of the word lists I use, too, but what does it mean? I know someone with that as a last name... and what about uhzvfz?

Here's the answer I intended:

F N G E N C N H E B E N G E R N G L E B N Q V R N E G V R E C N L R E F

The word here that is omitted from many dictionaries is 'ebnqvr'.

I'd be surprised if anyone could get this without some computer assistance...

SPOILER

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SHAKES HUMISM AMENTA KINDER ESTEEM SMARMS

(or shames, shapes)

SHARIA HUMANS AMENDS RANDIE INDIES ASSESS

(or Sheria)

Correct on both words. After checking in some dictionaries, both words are listed in Chambers and the first is also in the OED.