The regular plural suffix for feminine nouns is -āt (الألف والتاء ), which is not only reserved for nouns ending in a ta-marbūṭa (like توقُع، توقُعات  – expectation(s)) and not all nouns ending in a ta-marbūṭa exhibit this plural.

Example: The plural of  مدرّسة  (female teacher) is مدرّسات