The suffix “-our” appears in a subset of English vocabulary, often derived from French. Words using this ending frequently have counterparts spelled with “-or,” reflecting differences in American and British spelling conventions. For instance, “colour” (British) and “color” (American) share the same meaning and pronunciation.
This divergence in spelling reflects the evolution of the English language and its complex relationship with other languages, particularly French. Preserving the “-our” ending in some variants maintains a visual link to the words’ etymological roots and contributes to the richness and diversity of English orthography. Understanding these variations can be valuable for clear communication and appreciating the historical influences on modern English.