Roget's Thesaurus

#612. Impulse

Nouns

impulse, sudden thought; impromptu, improvisation; inspiration, flash, spurt. improvisatore; creature of impulse.

Verbs

flash on the mind. say what comes uppermost; improvise, extemporize.

Adjectives

extemporaneous, impulsive, indeliberate; snap; improvised, improvisate, improvisatory; unpremeditated, unmeditated; improvise; unprompted, unguided; natural, unguarded; spontaneous etc. (voluntary) 600; instinctive etc. 601.

Adverbs

extempore, extemporaneously; offhand, impromptu, a limproviste [Fr.]; improviso; on the spur of the moment, on the spur of the occasion.