Diary & Dairy – These two words share the same set of letters but with different spelling. With just the reversion of two vowels, the meaning is changed. Thais well recognize the noun ‘diary’ as it’s a common English loanword, meaning a small book for writing notes and records, mostly for daily accounts. The term ‘dairy’ can be both noun and adjective, meaning a place producing milk and milk-related products and a generic classification of such products.