Fluids rhymes with:
acids, antacids, arachnids, ballads, bicuspids, coloreds, desmids, gorrids, harrod's, harrods, hatreds, hundreds, hybrids, invalids, likud's, limited's, liquids, methods, miracid's, muhammad's, orchids, period's, periods, pleiads, preferreds, rapids, salads, solids, synod's, united's
Fluids sounds like:
fallouts, falotico, faulds, faults, feldhaus, feltes, felts, feltus, feltz, field's, fieldhouse, fields, fields', fildes, filets, fillets, flatheads, flats, flattish, fledge, fleet's, fleets, fleitas, floats, floods, flouts, flutes, folds, folts, foltz, foulds, fults, fultz