is the word days a homophone?

Yes.

http://www.all-about-spelling.com/list-of-homophones.html

Daze

To determine if the word "days" is a homophone, we need to identify any other words that sound the same but have different meanings and spellings. In this case, "days" is not a homophone because there are no other words in English that sound exactly like "days" but have a different spelling and meaning.

However, it is worth noting that there are homophones for the word "day" (singular form of "days"). For example, "dey" (a title given to certain rulers in North Africa) and "dé" (a French word meaning "of" or "from") sound the same but have different spellings and meanings.