1 answer, reply, come back, return, react, reciprocate, counter; rejoin, retort:
When Sean insulted her, Una responded with a slap to his face. I said, 'Good morning!' and Adrian responded, 'What's good about it?'
2 Often, respond to. be responsive (to), react (to), empathize (with), sympathize (with), commiserate (with), feel for, pity, be affected or moved or touched (by):
Many respond to those charity appeals for the crippled and disabled.