MDBG Mobile Chinese English Dictionary (iPhone, Android, Windows Phone)

响	xiǎng	echo / sound / noise / to make a sound / to sound / to ring / loud / classifier for noises
呼应	hū yìng	to conform (with) / to echo / to correlate well / (linguistics) agreement
附和	fù hè	to agree / to go along with / to echo (what sb says)
回响	huí xiǎng	to echo / to reverberate / to respond / echo / response / reaction
回荡	huí dàng	to resound / to reverberate / to echo
伴唱	bàn chàng	vocal accompaniment / to accompany a singer / to support of sb / to echo sb / to chime in with sb
应和	yìng hè	to echo one another / to respond (in agreement)
一唱一和	yī chàng yī hè	to echo one another (idiom)
打边鼓	dǎ biān gǔ	to echo what sb said / to back sb up from the sidelines (in an argument)
嗣响	sì xiǎng	lit. a following echo / fig. to continue (a tradition)