Is there a term describe word pairs like colour/color that have the same meaning, similar or same pronunciation but a different spelling?
The most common examples I can think of are English/American spelling variants, though there are alternative transliterations of foreign words would fit the bill too (e.g., Ziggurat/Ziqqurat).
I was wondering if there is a recognised word for describing these word pairings as we have terminology like "homonym", "heteronym" etc. for words with different meanings.