Confused Words

Roll and Role

Roll means to revolve, turn over, move, rotate, etc.

Role means function, task, responsibility, part, character, etc.

The lorry rolled down the hillside.

They rolled the injured guy on to his back to give him first aid.

Tom was sentenced for his role in the bank robbery.

He was given the lead role in the play.

Transport

Transport = (i) the system that carries passengers (or goods) from one place to another: ‘I spent most of my money on hotels, food, and transport.’ ‘Trains are still my favorite form of transport.’ ‘People should be encouraged to use public transport.’ (ii) something that serves as a means of transport, such as truck, bus etc.: ‘Applicants must have their own transport.’
Transport is an uncountable noun.
Transportation usually refers to the process or business of moving things, especially goods, from one place to another: ‘Information regarding the transportation and storage of nuclear waste is difficult to obtain.’