For single-letter symbols, I am unable to find anything longer than Ed Wolpow's PSYCHOPANNYCHY , though for the case where repeated symbols are forbidden I can offer the 8-letter WICKYUPS, UNBISHOP
, CUSHIONY, CHIBOUKS, and BOYCHIKS.
WASHINGTON--The bishops versus the unbishops. That's really where it's at, at the 50th anniversary meeting of the U.S.
The busiest people that first morning were the unbishops, who were "handing out a three-page mimeographed document called 'The People's Agenda" Someone thrust a copy into Archbishop Fulton Sheen's hands.