echo-, ech- (Greek: sound, noise; especially a returned sound; repetition, imitation).anecho:
anechoic:
catecheses (plural):
catechesis (singular):
catechetical:
catechism:
catechist:
catechization:
catechize:
catechizing:
catechumen:
echo:
echoacousia:
echoacusis:
echocardiogram:
echocardiograph:
echocardiography:
echoed:
echoencephalography:
echoes:
echoesis:
echogenic:
echogram:
echograph:
echographer:
echographia:
echography:
echoic:
echoism:
echokinesia:
echokinesis:
echolalia:
echolocation:
echomimia:
echomotism:
echopathy:
echophonia:
echophony:
echophotony:
echophrasia:
echopraxia:
echoscope:
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