reply, respond, rejoin, retort, acknowledge, give answer, field questions, say, echo, return, remark, make reply, return for answer, talk back*, answer back*, come back with*, flash back*, shoot back*.
To be sufficient
To move in response
To provide a solution
answer implies saying, writing, or acting in return, as required by the situation or by courtesy to answer a letter, to answer the phone; respond implies an appropriate reaction, either in words or action, made voluntarily or spontaneously to that which serves as a stimulus to respond to an appeal; reply in its strictest application refers to an answer that directly or in detail satisfies a question, charge, etc.; retort suggests a reply, esp. one that is sharp or witty, provoked by a charge or criticism; rejoin implies an answer, originally to a reply, now often to an objection
response, reply, return, statement, antiphon, retort, riposte, echo, reverberation, reaction, retaliation, repartee, password, rebuttal, approval, replication, acknowledgment, sign, rejoinder, comeback, back talk*.
Something spoken or written in return, as to a question or demand:rejoinder, reply, response. See ask
Something worked out to explain, resolve, or provide a method for dealing with and settling a problem:determination, solution. (Mathematics) result. See ask
To speak or act in response, as to a question:rejoin, reply, respond, retort, return, riposte. See ask
To meet a need or requirement:do, serve, suffice, suit. See excess, help
To supply fully or completely:fill, fulfill, meet1, satisfy. See do