The term 'END OF AN ERA' can be represented by three crossword solutions: ZOIC (4 letters), SCHWA (5 letters), and ONEBC (5 letters). ZOIC is AN adjective meaning 'of or relating to animal life or the organic world'. SCHWA is a linguistic term referring to AN unstressed mid central vowel sound. ONEBC is AN acronym for the Ontario Network of Excellence in Biomedical Computing, a research network that focuses on biomedical computing. All three terms represent the idea of a significant change or transition, which is what 'END OF AN ERA' implies.