To what extent are the hadiths in "An-Nihayah fi Gharib al-Hadith wal-Athar" and "Al-Faiq fi Gharib al-Hadith" authentic, and how can their authenticity be verified without chains of transmission (asanid)?

The hadiths in "An-Nihayah" and "Al-Fa'iq" include sound, good, and weak narrations. Their authors did not commit to authenticity, but rather focused on explaining uncommon words. To ascertain the authenticity of the hadiths, one must research them in books of hadith authentication (takhrij) or books that mention chains of narration (asanid), and then examine their chains of narration.