What do you call words with gh kn type sounds?

There isn't a specific term for words with "gh", "kn", or similar combinations of letters representing sounds that don't match the individual letters. However, we can categorize these instances as follows:

* Digraphs: This refers to two letters that represent a single sound. Examples of digraphs in English include:

* "gh": "ghost", "laugh" (silent "gh" or representing a different sound than "g" and "h")

* "kn": "knife", "know" (the "k" sound is represented by both letters)

* "ph": "phone", "graph" (representing the "f" sound)

* Silent letters: This refers to letters that are present in the spelling but are not pronounced. Examples of silent letters in English include:

* "gh": "night", "high" (silent "gh")

* "e": "make", "bike" (silent "e" at the end of the word)

* Phonetic irregularities: This refers to words where the spelling doesn't directly correspond to the pronunciation. Many words in English exhibit these irregularities, often due to historical changes in the language.

While there isn't a specific name for all words with these types of sound combinations, understanding the concepts of digraphs, silent letters, and phonetic irregularities can help you better understand these aspects of English spelling.