gallon - litre, inch - ?

CENTEMETRE
List of words for the clue gallon - litre, inch - ? from the crossword:
UNIT PETROL MIL YARD PICA POUND MILE METRE LITER KILOMETRE KILOGRAM RETAIL MAGNUM L ACRE PINTS PINT QUART PER
WordClue
ACRElitre - gallon, hectare - ?
INCHlitre - gallon, centemetre - ?
MILElitre - gallon, kilometre - ?
PUMPof petrol or heat
UNITinch or minute
YARDlitre - gallon, metre - ?
FARADunit of capacitance
HERTZSI unit for frequency
LITREinch - centemetre, gallon - ?
METREgallon - litre, yard - ?
MONTHunit of time dividing the year
OUNCEunit of mass
PENNYunit of currency in various countries
POUNDlitre - gallon, kilogram - ?
QUARTunit of volume
ENGINEturbojet or petrol
GALLONmetre - yard, litre - ?
HECTAREinch - centemetre, acre - ?
KILOGRAMgallon - litre, pound - ?
KILOMETREgallon - litre, mile - ?
ANNOYANCEgall and wormwood
KILOMETREgallon - litre, mile - ?