Sportwagon (used in the 60's and 70's on mid size wagons),
LeSabre 1951 show car, and 1959-2006 production cars,
Wildcat 1953-54-55 show cars, 1962-70 production cars, 1985 and 1997 prototypes.
Riviera used in 1949-58 mainly to designate hardtop models, in 1959-1962 to designate the Electra 6 window hardtop, and in 1963-1999.
Custom, used in the 50's on Canadian Buicks and in the 60's and 70's for the upscale trim on Invicta, Electra, LeSabre, Wildcat, Skylark, Century and Riviera models since 1960. Later used for the cheaper trim on Buicks (until this year).
Limited, 1936-42, 1958 models, trim option since 1965 on the Electra 225 and since 1979 in other Buick models (until this year).
GranSport or GS (used on Skylark, Wildcat, Riviera, Century and Regal models) 1965-2005
What are yours?