Synonyms for Unformed (same or very similar meaning)
WordNet sense 1 (having no definite form or distinct shape):
amorphous, shapelessWordNet sense 2 (not having or belonging to a structured whole):
unorganized, unorganisedWordNet sense 3 (not yet mature):
immatureWordNet sense 4 (not developed):
undevelopedFrom the ODE community, based on WordNetadd/edit