Synonyms of investigation in English:

investigation


See US English definition of investigation

See UK English definition of investigation

See Spanish definition of estudio

noun

1‘this claim requires further investigation’

SYNONYMS
examination, inquiry, study, inspection, exploration, consideration, analysis, appraisal
research, scrutiny, scrutinization, scanning, perusal, sifting, fact-finding
probe, review, survey, search
inquest, hearing, questioning, interrogation, inquisition
audit, evaluation
informal snoop, snooping, post-mortem, recce