مَسَاجِدُ / دَوَابُّ / مَصَابِيحُ: the book's ultimate broken-plural patterns; diptotes.
صَيَاقِلَةٌ / فَرَازِنَةٌ: the book's explicit fully declinable contrasts.
كُتُبٌ / رِجَالٌ: other broken plurals, fully declinable.
Ask three questions: What is the pattern? What governs its case? Is there al- or iḍāfa?