Synonyms of investigation

1 Syllable

trials, test, hunt, case, pike, check, search, quiz, quest

2 Syllables

probing, sounding, audit, surveying, question, hearing, hustle, survey, recon, shotguns, probe, assaying, wringer, wringers, assayed, gander, finals, redraft, inquest, assay, research, shotgun, quizzing, review, legwork, questions, study, studies, delving

3 Syllables

fact-finding, inquiries, nosiness, snoopiness, observing, enquiry, diagnosis, enquiries, reviewal, inquiry, look-over, scrutiny, inspection, audited, showcase, inspections

4 Syllables

inquisition, perquisition, etiology, analyses, observation, inquiringness, inquisitions, curiosity, observations, perlustration, analysis, curiosities, embryology, histology, pilgrimmage, anatomy, etiologies, exploration

5 Syllables

reconnaissance, interrogation, examination, interestingness, interrogations, examinations

6 Syllables

cross-examination, interrogatory, experimentations, interrogatories, inquisitiveness, experimentation