Synonyms and related words :
amassing evidence, appraisal, assessment, assortment, bolting, categorization, clarification, classification, close inquiry, colature, culling, department of investigation, destructive distillation, detection, detective work, distillation, edulcoration, elution, elutriation, essentialization, evaluation, exhaustive study, extraction, factoring, filtering, filtration, gauging, gradation, grouping, hearing, identification, indagation, investigation, investigative bureau, leaching, legislative investigation, legwork, lixiviation, percolation, perscrutation, placement, probe, purification, ranking, refinement, research, riddling, screening, selection, separation, sieving, sifting out, sleuthing, sorting, sorting out, spiritualization, straining, sublimation, subordination, taxonomy, triage, weighing, winnowing, witch-hunt