mile - kilometre, acre - ?

HECTARE
List of words for the clue mile - kilometre, acre - ? from the crossword:
ROO UNIT INCH ROOD MARATHON POUND GALLON CENTEMETRE LITRE KM KLICK KILOMETER KILOGRAM EEYORE ROODS MI WISE POOH NAUT
WordClue
ACREkilometre - mile, hectare - ?
INCHkilometre - mile, centemetre - ?
MILEhectare - acre, kilometre - ?
UNITinch or mile
YARDhectare - acre, metre - ?
CURIEnon-SI unit of radioactivity
FARADunit of capacitance
HERTZSI unit for frequency
LITREmile - kilometre, gallon - ?
METREacre - hectare, yard - ?
MONTHunit of time dividing the year
OUNCEunit of mass
PENNYunit of currency in various countries
POUNDkilometre - mile, kilogram - ?
QUARTunit of volume
GALLONkilometre - mile, litre - ?
KILOGRAMmile - kilometre, pound - ?
MARATHON42.195 kilometre road race
KILOMETREacre - hectare, mile - ?
CENTEMETREmile - kilometre, inch - ?
REPROACHmild rebuke, or an implied criticism
LITREmile - kilometre, gallon - ?