firsts — being before all others with respect to time, order, rank, importance, etc., used as the ordinal number of one: the first edition; the first vice president.
mains — a river in central and W Germany, flowing W from the Bohemian Forest in N Bavaria into the Rhine at Mainz. 305 miles (490 km) long.
masters — a degree awarded by a graduate school or department, usually to a person who has completed at least one year of graduate study.
primaries — first or highest in rank or importance; chief; principal: his primary goals in life.
tops — pertaining to, situated at, or forming the top; highest; uppermost; upper: the top shelf.
