Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
tĕnĕrĭtūdo, ĭnis, f. [tener], softness, tenderness si terra teneritudinem habet, Varr. R. R. 1, 36; casei, Pall. Mai, 9, 2: corticis, id. Jan. 15, 16: pueri primae teneritudinis, of the tenderest age, Suet. Tib. 44.