reappeared, disappearing, vanishing, appearing, resurfaced, reemerged, slinking, creeping, fading, surfacing, popping, reemerge, receding, flitting, reverting, flitter, mutating, noticing, disintegrating, trotting, reintroduced, returning, imploding, springing, cropping, molts, resurrected, circling, stalked, repeating, recurs, slipping, migrates, morphing, stumbling, totters, cantering, resurged, galloping, sprouting, lurking, scudding, collapsing, metamorphosing, harking, petered, shifting, veering, lie dormant, succumbing, ossifying, dissipating, blipping, sauntering, transmogrifying, retreating, dashing, banished, unraveling, shedding, occurring, drifting, hatching, disembowelling, hopping, beckon, erupting, dapples, reproducing, skulking, reassembling, flickers, turning, rerunning, permeating, spreading, festers, glimpsing, slithering, decimating, infecting, dropping, plague, fizzling, emerges, mottled, withered, mystify, tapering, mouldering, proliferating, loomed, germinating, materializing, predominate, nibbling, incubating, fragmenting, seeing, darkening, breezing, eradicated, redeemer, amounting, appellation, ascendant, bach, becoming, belonging, caesars, cato, cease, cicero, commence, dayes, derive, dying, edgar, hereafter, hopes, jefferson

periodic