We don't have synonyms for covariances yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are covariance, variances and invariances.
(n) :
(statistics) A statistical measure defined as scriptstyle operatorname Cov(X,Y)= operatorname E((X-μ)(Y-ν)) given two real-valued random variables X and Y, with expected values scriptstyle E(X),=,μ and scriptstyle E(Y),=,ν.
(n) :
(object-oriented programming) The conversion of data types from wider to narrower in certain situations.
(n) :
(statistics) A statistical measure defined as scriptstyle operatorname Cov(X,Y)= operatorname E((X-μ)(Y-ν)) given two real-valued random variables X and Y, with expected values scriptstyle E(X),=,μ and scriptstyle E(Y),=,ν.
(n) :
(object-oriented programming) The conversion of data types from wider to narrower in certain situations.