hectare - acre, litre - ?

GALLON
List of words for the clue hectare - acre, litre - ? from the crossword:
ROO ARE YARD POUND MILE METRE KILOMETRE INCH CENTEMETRE PETROL ROOD AREA RETAIL MAGNUM LITER L KILOGRAM TEACHER ACRES
WordClue
ACRElitre - gallon, hectare - ?
INCHhectare - acre, centemetre - ?
MILEhectare - acre, kilometre - ?
UNITcarat or gallon
YARDhectare - acre, metre - ?
LITREyard - metre, gallon - ?
METREacre - hectare, yard - ?
POUNDhectare - acre, kilogram - ?
FOREVERDiamonds Are ... (film)
HECTAREyard - metre, acre - ?
SAWMILLwhere logs are cut
STADIUMvenue where sporting events are held
DIAMONDSAre Forever (film)
KILOGRAMgallon - litre, pound - ?
KILOMETREacre - hectare, mile - ?
CENTEMETREacre - hectare, inch - ?
GREENHOUSEbuilding in which plants are grown
MILEhectare - acre, kilometre - ?
YARDhectare - acre, metre - ?