metre - yard, hectare - ?

ACRE
List of words for the clue metre - yard, hectare - ? from the crossword:
POUND GALLON METER FOOT LITRE INCH AREA TIME M KILOGRAM ARE STERE TEACHER MILE KILOMETRE CENTEMETRE ACRES PROSODY MEASURE
WordClue
INCHhectare - acre, centemetre - ?
MILEhectare - acre, kilometre - ?
YARDhectare - acre, metre - ?
LITREyard - metre, gallon - ?
METREacre - hectare, yard - ?
POUNDmetre - yard, kilogram - ?
GALLONmetre - yard, litre - ?
HECTAREyard - metre, acre - ?
HUNDREDFranklin, yard
KILOGRAMyard - metre, pound - ?
KILOMETREacre - hectare, mile - ?
CENTEMETREacre - hectare, inch - ?
PROCEDUREmethod, routine
POUNDmetre - yard, kilogram - ?