What is the word that shows moderate electrical conductivity?

Any material is classified as conductor or insulator. There is no perfect conductor or perfect insulator. If a material exhibits more conductivity it is called a conductor and materials with very low conductivity are called insulators. Materials with moderate conductivity would have medium range resistance to electricity. In practice, though, a material either conducts or it doesn't. 'Moderate' would be determined by what you were comparing it to.