Quenya 

otso

cardinal. seven

otso cardinal "seven" (SA:sîr, OT/OTOS/OTOK, VT48:6); otsëa ordinal "seventh" (VT42:25)

otso

cardinal. 7, seven
Quenya [PE17/095.3901; PE17/096.0101; SA/sîr.021; VT47/42.0208; VT47/42.1602; VT47/42.1611; VT47/42.1708; VT48/06.1416] Group: Eldamo. Published by

otsola

week

otsola noun "week" (evidently referring to a week of seven days like our own, since otso = seven). (GL:62). Compare enquië, the Eldarin six-day week, and lemnar, a five-day week.

osco

cardinal. seven
Quenya Group: Eldamo. Published by

otos

cardinal. seven
Quenya Group: Eldamo. Published by

otsëa

ordinal. seventh
Quenya [VT42/25.1209] Group: Eldamo. Published by

otsëa

seventh

otsëa ordinal "seventh" (VT42:25). See otso.

Otselen

seven stars

Otselen noun "Seven Stars" (otso + elen), a name of the Great Bear (constellation) (OT/OTOS/OTOK)

lemnar

week

lemnar noun "week" (of five days) (LEP/LEPEN/LEPEK). Compare enquië, otsola.