prolusion /prə-, prō-looˈzhən or -lūˈ/

1. A preliminary performance, activity or display
2. An essay preparatory to a more solid treatise

proluˈsory /-sə-ri/ adjective

• exsufflations
• exsufflicate
• ext.
• ex tacito
• extant
• extasy
• extatic
• extemporal
• extemporaneities
• extemporaneity
• extemporaneous
• extemporaneously
• extemporaneousness
• extemporarily
• extemporariness
• extemporarinesses
• extemporary
• extempore
• extempores
• extemporisation
• extemporise
• extemporised
• extemporises
• extemporising
• extemporization