Synonyms of investigation

investigation

noun

as in inquiry

a systematic search for the truth or facts about something

officials launched an extensive investigation of the plane crash

Synonyms & Similar Words

• inquiry
• examination
• exploration
• study
• probe
• probing
• research
• inspection
• inquisition
• inquest
• probation
• delving
• survey
• disquisition
• questionnaire
• audit
• quest
• interrogation
• diagnosis
• examen
• hearing
• trial
• question
• reinvestigation
• checkup
• poll
• query
• challenge
• cross-examination
• rehearing
• check
• grilling
• soul-searching
• questionary
• quiz
• feeler
• self-examination
• self-reflection
• self-scrutiny
• going-over
• self-exploration
• self-questioning

Example Sentences

Recent Examples of investigation

The agency has required the building’s owner to hire a third-party engineer to conduct a forensic evaluation — a formal investigation to determine the cause of the structural failure. — Emma Tucker, CNN Money, 9 July 2026

There were 267 investigations opened by California wildlife officials into wolf-livestock predation in 2025, up from 74 the previous year. — Clara Harter, Los Angeles Times, 9 July 2026

Robinson's attorneys questioned law enforcement officials about security preparations ahead of the event and the subsequent investigation, including an unfired bullet and another gun that were found on campus. — Amanda Lee Myers, USA Today, 9 July 2026

The shooting remains under investigation by the Department of Homeland Security’s Office of Inspector General, while the FBI’s Houston field office is conducting a separate investigation, according to ICE. — Angelique Brenes, PEOPLE, 8 July 2026

Through its investigation, the Sheriff’s Office determined that the vehicle had been reported stolen in June out of Canyon County, the spokesperson said. — Kevin Fixler july 8, Idaho Statesman, 8 July 2026

The Minnesota Department of Children, Youth and Families, which oversees childcare center licenses, did not immediately respond Wednesday to an email asking the status of an investigation into the incident. — Nick Ferraro, Twin Cities, 8 July 2026

If an investigation finds evidence that a doctor violated the law, the medical commission issues a statement of charges. — Ashley Hiruko, ProPublica, 8 July 2026

The gambit could backfire further if an investigation into his finances continues and creates a scenario requiring a second special election. — ABC News, 8 July 2026