compound noun
US /ˈkɑːmpaʊnd naʊn/
UK /ˈkɑːmpaʊnd naʊn/

1.
rzeczownik złożony
a noun made up of two or more words, which may be written as one word, as two hyphenated words, or as two separate words
:
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The word 'sunflower' is a compound noun.
Słowo 'słonecznik' to rzeczownik złożony.
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'High school' is an example of a compound noun written as two separate words.
'High school' to przykład rzeczownika złożonego zapisanego jako dwa oddzielne słowa.