Rota
Part of speech: noun
Definition: A schedule that allocates some task, responsibility or (rarely) privilege between a set of people according to a (possibly periodic) calendar.
Roster
Part of speech: noun
Definition: A list of names, usually for an organisation of some kind such as military officers and enlisted personnel enrolled in a particular unit; a muster roll; or a sports team, with the names of players who are eligible to be placed in the lineup for a particular game.A list of the jobs to be done by members of an organisation and often with the date/time that they are expected to do them.
Part of speech: verb
Definition: The act of placing a name on a roster.