/f/ Sound Spelled UGH Word List
The /f/ sound has three common spellings, f, ff, and ph, and one unusual one, ugh.
The decision to teach "ugh" as representing the /f/ sound is discussed in some depth as a footnote on the page. It appears in only a small number of words, but attempting to explain those words has resulted in a lot of poor curriculum choices. The OnTrack Reading choice simplifies the phonics of four other digraphs, "ough", "ou", "au", and "gh". Given the small number of words involved, it is reasonable to treat "ugh" as a digraph for the /f/ sound in these words.
Of the 7,000 words in the database constructed from a popular children’s dictionary, eight of them are words with the /f/ sound spelled "ugh".
Note on the word divisions: Each word is divided into chunks determined by the unique and highly effective OnTrack Reading Multisyllable Method. The chunks are not syllables.