yard - metre, gallon - ?

LITRE
List of words for the clue yard - metre, gallon - ? from the crossword:
ACRE POUND KILOGRAM UNIT METER FOOT TIME M HECTARE INCH STERE PINTS PINT PROSODY MEASURE KILOLITRE KILOLITER CENTARE CADENCE
WordClue
ACREmetre - yard, hectare - ?
INCHlitre - gallon, centemetre - ?
MILElitre - gallon, kilometre - ?
UNITcarat or gallon
YARDlitre - gallon, metre - ?
METREgallon - litre, yard - ?
POUNDmetre - yard, kilogram - ?
GALLONmetre - yard, litre - ?
HECTAREyard - metre, acre - ?
HUNDREDFranklin, yard
KILOGRAMyard - metre, pound - ?
KILOMETREgallon - litre, mile - ?
CENTEMETREgallon - litre, inch - ?
HECTAREyard - metre, acre - ?
KILOGRAMyard - metre, pound - ?