semester Synonyms

time constraints biannually biyearly biannual calendar month solar year terms school year academic year school term sixer sextuplet lunar month lunar year hexagram six months half a year Sessions intersession Hilary halfyear half-year sidereal year millisecond microsecond maturity date half a dozen bissextile year portion period month minute millennium hour hexahedron hexagon hexad half duration quarter second session year week trimester time term spell span six