ad-lib

Synonyms

clap (together or up), extemporize, fake, improvise;

Near Antonyms

arrange, lay, prepare, ready;

consider, contemplate, ponder, study;

exercise, practice (also practise), rehearse;

Related Words

concoct, contrive, cook (up), devise, fabricate, hatch, invent, make up, manufacture, think (up);

cobble (together or up), dash (off);

Synonyms

ad hoc, extemporaneous, extemporary, extempore, impromptu, improvisational, improvised, off-the-cuff, offhand, offhanded, snap, spur-of-the-moment, unconsidered, unplanned, unpremeditated, unprepared, unrehearsed, unstudied;

Antonyms

considered, planned, premeditated, premeditative, prepared, rehearsed;

Near Antonyms

deliberate, intended, intentional;

Related Words

unscripted;

automatic, impulsive, instinctive, involuntary, spontaneous;

casual, cursive, informal, unauthorized;

half-baked, half-cocked, ill-advised;