Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
formōsĭtas, ātis, f. [formosus], beauty (very rare): uxor eximia formositate praedita, App. M. 9, p. 224, 24: decorum positum est in tribus rebus, formositate, ordine, ornatu ad actionem apto, * Cic. Off. 1, 35, 126.