You failed to check the terms of my loan and assumed it was on an interest basis. I literally told you I borrowed 100 and promised to pay 110. I also failed to note a term and you also assumed there was one. I do mention interest later on so that's a fair assumption, if misguided.
I might be guilty of abusing an industry term or two 8)
You said interest. It's right there. In practice all loans have interest. No matter what you call it, it's interest as the word is understood in finance.