density (n.)
- asininity
- body
- boorishness
- callosity
- callousness
- concreteness
- crassness
- crudeness
- denseness
- dimness
- dullness
- dumbness
- durability
- firmness
- grossness
- hardness
- hebetude
- impenetrability
- induration
- lethargy
- mass
- materiality
- obduracy
- obtuseness
- opacity
- palpability
- resistance
- restiveness
- slowness
- sluggishness
- solidity
- sottishness
- soundness
- stability
- steadiness
- stolidity
- stoutness
- strength
- stupidity
- sturdiness
- substance
- substantiality
- substantialness
- tangibility
- toughness
