Word Study
sporadic
CIDE DICTIONARY
sporadic, a. [Gr. scattered, fr. , , scattered, fr. to sow seed, to scatter like seed: cf. F. sporadique. See Spore.].
Occurring singly, or apart from other things of the same kind, or in scattered instances; separate; single; as, a sporadic fireball; a sporadic case of disease; a sporadic example of a flower. [1913 Webster]
OXFORD DICTIONARY
sporadic, adj. occurring only here and there or occasionally, separate, scattered.
Derivative
sporadically adv.
Etymology
med.L sporadicus f. Gk sporadikos f. sporas -ados scattered: cf. speiro to sow
THESAURUS
sporadic
aimless, amorphous, broadcast, broken, capricious, careening, casual, catching, catchy, chance, changeable, changing, choppy, communicable, contagious, desultory, deviating, deviative, deviatory, different, diffuse, disarticulated, disconnected, discontinuous, discrete, disjunct, disordered, disorderly, dispersed, dispread, disproportionate, disseminated, dissipated, distributed, divaricate, divergent, diversified, diversiform, eccentric, endemic, epidemial, epidemic, epiphytotic, epizootic, erose, erratic, few, fitful, flickering, fluctuating, formless, frivolous, gratuitous, guttering, halting, haphazard, herky-jerky, heteroclite, hit-or-miss, immethodical, impulsive, inchoate, incoherent, inconsistent, inconstant, indiscriminate, infectious, infective, inoculable, intermittent, intermitting, irregular, jagged, jerky, lurching, meaningless, mercurial, misshapen, motley, mutable, nonconformist, nonstandard, nonsymmetrical, nonsystematic, nonuniform, occasional, on-again-off-again, orderless, pandemic, patchy, periodical, pestiferous, pestilential, planless, pluralistic, promiscuous, ragged, rambling, random, rare, rough, scarce, scattered, scrappy, seldom, senseless, separate, shapeless, single, snatchy, sparse, spasmatic, spasmic, spasmodic, spasmodical, spastic, spotty, spread, spreading, staggering, straggling, straggly, strewn, strown, systemless, taking, unarranged, uncertain, unclassified, uncommon, undirected, unequable, unequal, uneven, unexpected, unfrequent, ungraded, unjoined, unmethodical, unmetrical, unordered, unorganized, unorthodox, unregular, unrhythmical, unsettled, unsorted, unstable, unsteady, unsymmetrical, unsystematic, ununiform, vague, variable, variegated, variform, various, varying, veering, wandering, wavering, widespread, wobbling, wobbly, zymoticROGET THESAURUS
sporadic
Dispersion
N nonassemblage, dispersion, dispersion, disjunction, divergence, aspersion, scattering, dissemination, diffusion, dissipation, distribution, apportionment, spread, respersion, circumfusion, interspersion, spargefaction, affusion, waifs and estrays, flotsam and jetsam, disjecta membra waveson, unassembled &c (assemble), dispersed, sparse, dispread, broadcast, sporadic, widespread, epidemic, adrift, stray, disheveled, streaming, sparsim, here and there, passim.For further exploring for "sporadic" in Webster Dictionary Online