— [noun] (92)

— [adjective] (52)

— [adverb] (8)

— investigate, inspect [verb (intransitive)] (21)

— investigate, examine [verb (transitive)] (68)

— it needs investigation [phrase] (1)

— close examination, scrutiny (167)

— pre- or post-examination (11)

— re-examination (25)

— examination by discussion (19)

— inspection, survey (127)

— secret observation, spying (238)