Synonyms for Developing (same or very similar meaning)
WordNet sense 1 (processing a photosensitive material in order to make an image visible):
developmentWordNet sense 2 (relating to societies in which capital needed to industrialize is in short supply):
underdevelopedWordNet sense 3 (not having highly developed manufacturing enterprises):
nonindustrialFrom the ODE community, based on WordNetadd/edit