Synonyms for Structural (same or very similar meaning)
WordNet sense 1 (pertaining to geological structure):
morphological, geomorphologic, geomorphological, morphologicWordNet sense 2 (designed for or capable of a particular function or use):
functionalWordNet sense 3 (constructing or tending to construct or improve or promote development):
constructiveFrom the ODE community, based on WordNetadd/edit