whinier
No shinier is a comparative adjective. My shoes are shinier than yours. (My shoes and your shoes are being compared)
Shinier is an adjective. It's the comparative form of shiny.
After polishing them, the left shoe looked shinier than the right shoe did.
3
shinier
The shinier one.
Guacamole
shinier, shiniest
The coin will become much shinier. If you put ketchup on a coin for 4-5 mins. It will also become shinier.
shinier shiniest
Brighter.
Yes it makes the coat shinier