The Collaborative International Dictionary of English v.0.48:

Roster \Ros"ter\, n. [Perhaps a corruption of register; or cf.
   roll.] (Mil.)
   A register or roll showing the order in which officers,
   enlisted men, companies, or regiments are called on to serve.
   [1913 Webster]

WordNet (r) 3.0 (2006):

roster
    n 1: a list of names; "his name was struck off the rolls" [syn:
         roll, roster]

Moby Thesaurus II by Grady Ward, 1.0:

68 Moby Thesaurus words for "roster":
   account, agenda, annals, batting order, beadroll, bill,
   bill of fare, blueprint, budget, cadastre, calendar, card,
   carte du jour, catalog, census, census report, checklist,
   checkroll, chronicle, correspondence, docket, documentation,
   dramatis personae, head count, history, honor roll, inventory,
   jury list, jury panel, letters, lineup, list, list of agenda,
   memorial, menu, muster, muster roll, nose count, order of business,
   pipe roll, playbill, poll, program, program of operation,
   programma, property roll, prospectus, protocol, questionnaire,
   record, recording, register, registry, relic, remains, returns,
   roll, roll call, rolls, rota, schedule, scroll, slate, table,
   tax roll, token, trace, vestige



Bouvier's Law Dictionary, Revised 6th Ed (1856):

ROSTER. A list of persons who are in their turn to perform certain duties,
required of them by law. Tytler, on Courts Mart. 93.