tracer Synonyms

cluer radiocarbon atomic cocktail watcher trailer tracker surveyor spotter signer sharpie seeker scrutator scriber radiothorium tracer bullet tracer atom tagged atom tracer element scanner shamus outliner delimiter highlighter round shot decoder boffin radioisotope scorer researcher reporter dropper discoverer detective definer dauber dasher courser composer chaser channel bullet bookmark explorer follower pursuer printer pathfinder operative mouser marker