"Slovensko a Německo jsou naši sousedi."

Translation: Slovakia and Germany are our neighbors.

[JohnBraga1]

I thought the nominative plural of soused was sousedé???

[endless_sleeper]

Both are correct. Sousedé is more formal, sousedi more colloquial. I'd use the first one in writing.

[blflame]

I thought that "naši" was used only for masculine animate plural, and that nouns which end on "o" are neutral, no?

[sir_dejf]

In this case the word "nasi" is connected with the word "sousede/sousedi", not with the word "Slovensko or Nemecko".