Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
fundātĭo, ōnis, f. [2. fundo], a founding, foundation (very rare): fundationes aedium, Vitr. 5, 3: substructionis fodere, id. 3, 3; Hil. Trin. 11, 37.