Rigidity or a measure of rigidity

STIFFNESS
List of words for the clue Rigidity or a measure of rigidity from the crossword:
ACRE AREA CARAT UNIT OUNCE TON KARAT LITRE YARD SPAN LITER GRAM BTU METRE WATT MILE INCH TSP DRAM STERE
WordClue
BARmeasure
RAYbeam of light or radiation
SIRman of a higher rank or position
DARKcomplete or partial absence of light
RATEof interest or fertility
MOTORdiesel or stepping
ORDERfungus or stop-loss
PARTYRepublican or Conservative
POWERsolar or of will
RIVERNeva or Mekong
ADDICTof caffeine or cocaine
COLUMNvertebral or of newspaper
RARITYmeasure of the scarcity of an object
DISCORDLack of concord, agreement or harmony
TASTINGsmall amount of food or drink
PRESSUREatmospheric or of blood
ATTRIBUTEcharacteristic or quality of a thing
SMUGGLINGillegal movement of goods or people
PERCENTILEmeasure used in statistics
THERMOMETERdevice to measure temperature
STIFFNESSrigidity of an object
BJARNERiis, cyclist