What illegal practice involves lending money at unreasonably high rates?

Forgery is the fraudulent making or altering of a written document, such as falsifying a signature on a deed or contract, and has nothing to do with interest rates charged on loans.

Altercation refers to a heated dispute or physical confrontation between individuals and is not a legal or financial term applicable to lending practices in any context.

Puffing is the practice of making exaggerated, non-factual promotional statements about a property — such as calling it 'the most beautiful home in the city' — and is a marketing/agency concept entirely unrelated to interest rates or lending.