What are antonyms for the following words?

Correspond, density,dubious,enumerateWhat are antonyms for the following words?
correspond-Antonym: conflict

http://encarta.msn.com/thesaurus_5615697鈥?/a>

density-Antonyms: openness, sparseness, sparsity, thinness

http://www.answers.com/topic/density

dubious-certain, trustworthy, unambiguous

http://encarta.msn.com/thesaurus_5615720鈥?/a>

enumerate-Antonym: estimate

http://encarta.msn.com/thesaurus_5615726鈥?/a>