What is another word for "slack"?

Roget's Thesaurus (1911) lists these synonyms for "slack": abeyance, air, amianth, amianthus, annihilator, asbestos, attic, benumb, bite, blunt, box, brigade, burn, central, chatter, chill, congeal, congelation, conglaciation, cool, cooling, cut, damp, dead, density, dormant, dull, dullness, earth, extinguish, fan, fire, fireman, flat, flax, flexible, freeze, frigorific, frozen, gas.