Synonyms for Clunky (same or very similar meaning)
WordNet sense 1 (lacking grace in movement or posture):
clumsy, gawky, ungainly, unwieldyWordNet sense 2 (lacking grace or skill in manner or movement or performance):
awkwardWordNet sense 3 (heard or perceptible by the ear):
audible, hearableFrom the ODE community, based on WordNetadd/edit