LGT TAXIED ON ACTIVE RWY CAUSING AN FGT TO GO AROUND.

Narrative

FLT RAP-FSD-ORD; LANDED AT FSD ON RWY 21. DURING ROLLOUT; TWR CLRD TO 'LEFT TURN ON RWY 9; LEFT TURN ON NE PARALLEL; CLRD TO GATE'. MY INTERPRETATION AT NE PARALLEL WAS THE PARALLEL ON NE PORTION OF FIELD (15-33 PARALLEL). THIS WAS ALSO THE APPARENT LOGICAL ROUTING TO GATE. (SEE ATTACHED FIELD DIAGRAM.) NATIONAL GUARD RAMP S OF 9-27 IS GENERALLY NOT USED FOR TAXIING AND 9-27 FREQUENTLY IS. IT WAS NOT UNTIL WE WERE EBND ON 9 AND THE TWR FREQ WAS TAKEN OVER BY A MALE VOICE (PREVIOUS CTLR FEMALE) TELLING OUR ACFT TO GO AROUND THAT WE REALIZED THAT WHAT THE CTLR HAD INTENDED WAS 'TURN LEFT ON RWY 9; THEN TURN LEFT NE BOUND ON THE RWY-3-21 PARALLEL'. THE ACFT SENT AROUND WAS A MIL FGT MAKING A LOW DOWNWIND PASS TO RWY 9. THE FACT THAT HE WAS ON UHF AND WE COULD ONLY HEAR 1/2 THE CONVERSATION WITH HIM WAS POSSIBLY AN ADDITIONAL FACTOR IN THE MISUNDERSTANDING. HAD THE CTLR USED EITHER OF THE WORDS (BOUND; OR RWY 3-21) IN THE CLRNC; I FEEL THE ERROR WOULD NOT HAVE OCCURRED. STANDARD NOMENCLATURE WOULD SEEM TO DICTATE INCLUDING THE RWY NUMBERS WITH THE PARALLEL TXWYS; WHEN THE ARPT HAS MORE THAN ONE. GIVING THE TXWYS ALPHA 'A;B;C' DESIGNATIONS WOULD BE EVEN BETTER. APPARENTLY; THE FGT NEVER REPRESENTED A SERIOUS THREAT BECAUSE OF THE TIMELY GO AROUND.