EXTEMPORISING
Scrabble letter values: E1X8T1E1M3P3O1R1I1S1I1N1G2 = 25
Definition
EXTEMPORISING is the present participle of EXTEMPORISE.
verb EXTEMPORISE: perform without preparation.
Synonyms of EXTEMPORISE: improvise, improvize, ad-lib, extemporize