Polish Word Rectangles

In typical Polish crosswords, only nouns in their base form are allowed. These are the only four 7 × 7 squares whose rows and columns are Polish common nouns:

 C  E  R  A  M  I  K
 E  F  E  M  E  R  A
 R  E  K  E  T  E  R
 A  M  E J/B O  Z  A
 M  E  T  O  D  Y  K
 I  R  E  Z  Y  N  A
 K  A  R  A  K  A L/N

Add to them these twenty-five 7 × 7 squares that contain proper nouns. Like the word square above, all of them are symmetric.

 A  T  A  P  A  S  K     H  A  M  M  O  N  D
 T Y/E B  I  N  K  A     A  L  E  U  K  I  A
 A  B  I  A  T  A  R     M  E  I  S  T  E  R
 P  I  A  N  O  L  A     M  U  S  T  A  N  G
 A  N  T  O N/S I  K     O  K  T  A  W  I  A
 S  K  A  L  I N/C A     N  I  E  N  I  E  C
 K  A  R  A  K  A L/N    D  A  R  G  A  C  Z

 J  U  R  A  S  I  K     G  L  O  B  I  S  Z
 U  L  I  C  Z  K  A     L  U  B  A  N  I  A
 R  I  C  H  T  E  R     O  B  E  R  W  U  S
 A  C  H  T  U  B  A     B  A  R  K  A  S  A
 S  Z  T  U  B  A  K     I  N  W  A  L  I  D
 I  K  E  B  A  N  A     S  I  U  S  I  A  K
 K  A  R  A  K  A L/N    Z  A  S  A  D  K  A

 B  O  C  H  N  A  K     S  A  F  O  N  K  A
 O  C  H  R  A  N  A     A  B  E  L  A  R  D
 C  H  L  O  T  A  R     F  E  D  E  R  E  R
 H  R  O  M  A  D  A     O  L  E  D  Z  K  I
 N  A  T  A  N  E  K     N  A  R  Z  U  T  A
 A  N  A  D  E  M  A     K  R  E  K  T  U  N
 K  A  R  A  K  A L/N    A  D  R  I  A  N  A

G/H R  O  M  A  D  A
 R  Y  B  A  K  O  W
 O  B  S  Ł  O  N  A
 M  A  Ł  O  L  A  T
 A  K  O  L  I  T  A
 D  O  N  A  T  O  R
 A  W  A  T  A  R  A

Out of 2699 6 × 6 word squares, only two contain twelve different nouns:

K O M A S K    O S E M K A
U M A R Ł A    S Z K A R P
R E Z N O R    T E O N A S
A R G O N A    A R N I K A
S T A L I N    S Z O F E R
Z A J D K A    Z A M A N A

These are the only five 7 × 5 word rectangles:

 S  K  R  A  J  K  A     M  U  T  A  C  J  A
 A  L  O  Z  A  U  R     A  L  O  Z  A  U  R
M/P O  D  E  S  T  A     Z  A  G  O  Z  D  A
 K  W  A  K  I  E  R     E  M  A  L  I  E  R
 A  N  K  A  R  K  A     K  A  T  A  N  K  A

 H  E  L  A  N  I  N     Ł  A  W  K  A  R  Z
 U  P  A  D  O  W  A     A  B  S  A  L  O  N
 D  O  M  A  W  I  T     P  R  O  M  E  S  A
 A  D  E  N  I  N  A     K  A  L  I  N  I  N
 K  A  R  A  K  A  N     A  M  A  L  A  K  A

Out of 1275 6 × 5 word rectangles, this is the sole rectangle composed of common nouns only:

S H A R A N
Z A W O R A
E F E N D I
M I N I E R
A S A N N A

Tools used: Polimorfologik, where I extracted the nouns from, and Donald Knuth’s backtracking program back-mxn-words-new.w, modified by me to handle non-ASCII input. See the Bitbucket repository.

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Polish Word Rectangles