Givenness rhymes with:
ravenous, androgynous, asynchronous, bituminous, brazenness, chitinous, deaconess, exogenous, gelatinous, gluttonous, homogenous, indigenous, larcenous, luminous, membranous, monotonous, mountainous, mutinous, nitrogenous, nonpoisonous, oleaginous, ominous, outspokenness, patroness, poisonous, polygynous, ravenous, ruinous, tetanus, titinus, uranus, villainous, voluminous
Givenness sounds like:
g'vanni's, gabbing, gaping, gapinski, gasping, gaufman's, geving, gibbens, gibbins, gibbons, gibian's, giovanni's, giovenco, giovinazzo, givenchy, givens, givens's, giving, givins, goffman's, goofing, gosbank, gossiping, gubbins