Interest relates feeling. Hobby relates action.

Motels are generally aimed at families that are on road trips and for motorists who long for a comfortable bed to sleep in for the night. Hotels, on the other hand, are much more high-end, aimed at boosting...

Hair and Fur is basically the same thing. Hair is used in the context of humans, while fur is used to refer to animals.

Gallstones are hard, pebble-like deposits that form inside the gallbladder. Kidney Stones are a solid mass made up of tiny crystals in the kidney which usually pass out in the urine.

E-Ticket is an electronic printed ticket. I-Ticket is a ticket couriered to the traveler by the railways.