Answer: resistance

AnswerCrossword Clue
RESISTANCE

Underground activity

RESISTANCE

Denominator of Ohm's law

RESISTANCE

There's none in superconductivity

RESISTANCE
Organized underground movement.
RESISTANCE
The Maquis of France, W. W. II.
RESISTANCEUnderground group.
RESISTANCEUnderground movement.
RESISTANCEFreedom fighters
RESISTANCESuperconductivity's lack