Here is a list of Filipino root words that are repeated to make new words (salitang inuulit). The English definitions of these words are also included. The list is incomplete, but I hope you will find it helpful in your study. I am currently working on the list of Filipino compound words (salitang tambalan). I’ll post it in a few days.
Pagbubuo ng mga Salita_Inuulit
Here are two lessons on kambal-katinig (consonant blend) and diptonggo (diphthong). It took some time to find examples of Filipino words with consonant blends and diphthongs. Note that many words are borrowed from the Spanish language and the English language. The lists of examples are incomplete. I hope that you find these two lesson sheets helpful. Please comment if you would like to add more examples to the list. I will be happy to include them.