yard - metre, gallon - ?

LITRE
List of words for the clue yard - metre, gallon - ? from the crossword:
UNIT METER FOOT STERE ACRE POUND KILOGRAM PINTS PINT TIME PROSODY MEASURE M KILOLITRE KILOLITER HECTARE CENTARE CADENCE BEAT
WordClue
ACREmetre - yard, hectare - ?
INCHlitre - gallon, centemetre - ?
MASSmeter - distance, kilogram - ?
MILElitre - gallon, kilometre - ?
TIMEmeter - distance, second - ?
UNITcarat or gallon
YARDlitre - gallon, metre - ?
METREgallon - litre, yard - ?
OUNCEunit of mass
PENNYunit of currency in various countries
POUNDmetre - yard, kilogram - ?
QUARTunit of volume
GALLONmetre - yard, litre - ?
SECONDdistance - meter, time - ?
HECTAREyard - metre, acre - ?
HUNDREDFranklin, yard
DISTANCEsecond - time, meter - ?
KILOGRAMyard - metre, pound - ?
KILOMETREgallon - litre, mile - ?
CENTEMETREgallon - litre, inch - ?
HECTAREyard - metre, acre - ?
KILOGRAMyard - metre, pound - ?