really in WordNet English dictionary

1. in actual fact
   "to be nominally but not actually independent"; "no one actually saw the shark"; "large meteorites actually come from the asteroid belt"
   actually  really  actually  really 
   
2. in accordance with truth or fact or reality
   "she was now truly American"; "a genuinely open society"; "they don't really listen to us"
   truly  genuinely  really  truly  genuinely  really 
   
3. in fact (used as intensifiers or sentence modifiers)
   "in truth, moral decay hastened the decline of the Roman Empire"; "really, you shouldn't have done it"; "a truly awful book"
   in truth  really  truly  in truth  really  truly 
   
4. used as intensifiers; `real' is sometimes used informally for `really'; `rattling' is informal
   "she was very gifted"; "he played very well"; "a really enjoyable evening"; "I'm real sorry about it"; "a rattling good yarn"
   very  really  real  rattling  very  really  real  rattling