TELephone, telePHONic, teLEphony. PHOTograph, photoGRAphic,photOgraphy. biOLogy, bioLOGical.
The suffix changes the stress pattern of the rest of the word. Is English the only language with this system or are there other languages, with the same or a closely analogous system? French seems to not have this.
Not sure whether Indian English and Singlish and other versions/descendants of English that don't have the normal stress patterns are foreign languages, creoles, pidgins, or dialects of English. Out of my depth with respect to that topic.