novináských
Novináských appears to be not a standard Czech word found in common dictionaries. It seems to be a misspelling or a nonstandard form of the adjective novinářský, which means journalistic or pertaining to journalists. The standard form novinářských is used in contexts requiring the genitive plural or adjectival agreement with a plural noun.
In Czech, novinářský is derived from the noun novinář (journalist) with the adjectival suffix -ský. The form
Therefore, when intending to refer to something associated with journalists in standard Czech, the correct spelling