semicentennial Synonyms

semicentenary anniversary 50-year mark 50-year milestone 50-year occasion 500-year commemoration 500-year jubilee 500-year milestone 500-year observance 500-year remembrance 500th anniversary 50th anniversary 50th birthday 50th celebration 50-year landmark 50-year commemoration jubilee 50th golden anniversary golden jubilee golden wedding semicentennary 50th year five-hundredth anniversary 50 years 50-year achievement 50-year anniversary 50-year celebration 50th milestone