Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† archĭtectŏnĭcē, ēs, f., = ἀρχιτεκτονική (sc. τέχνη), the art of building, architecture, Quint. 2, 21, 8.
† archĭtectŏnĭcus, a, um, adj., = ἀρχιτεκτονικός, relating to architecture: rationes, Vitr. 9, 4.