Synonyms for Processional:

n.

congressional, inaugural, ceremonious, face to face, head-to-head, plenary, ceremonial, ritual. communication (noun)
prosodion.
processional (noun)
prosodion.

Other synonyms:

ceremonious, head-to-head. ritual, congressional, plenary, face to face, ceremonial, inaugural. Other relevant words:
ceremonious, head-to-head, plenary, ritual, inaugural, congressional, ceremonial.