reperio

Reperio, reperire, repperi, repertum, fourth conjugation. The perfect is properly repperi with a doubled p, though manuscripts and editions spell it both ways, and the doubling is the only thing that distinguishes the perfect stem from the present.

It is not a straight synonym of invenio. Invenio is to come upon a thing, with or without looking; reperio is to find by searching, so it suits enquiry, research and discovery. That is why a repertor is an inventor or discoverer and a repertorium is a list of what has been found, giving English repertory and repertoire. Two forms are ambiguous and worth pausing over: reperimus is present or perfect first plural, and reperit is present or perfect third singular.