As nouns the difference between relativity and relativeness
is that relativity
is the state of being relative to something else while relativeness
is the state or condition of being relative; relativity.
The state of being relative to something else.
(physics) The principle that the laws of physics should be the same for all observers.
(relativity) Either of two theories (special relativity or general relativity) developed by German-American physicist . Also called Einsteinian relativity .
The state or condition of being relative; relativity.