対応【たいおう】
correspondence (to), equivalence, suitability, coordination, matching, being appropriate (for), dealing with, coping with, handling, response, reception, reaction, compatibility (with technology, software, etc.), capability, support (for)
反応【はんのう】
reaction, response
応募【おうぼ】
application, subscription, entry (competition, raffle, etc.), enlistment
応援【おうえん】
aid, assistance, help, support, reinforcement, cheering, rooting (for), support
応じる【おうじる】
to respond, to satisfy, to accept, to comply with, to apply for
一応【いちおう】
more or less, though not quite satisfactorily, after a fashion, pretty much, roughly, so far as it goes, tentatively, for the time being, just in case, once
応用【おうよう】
(practical) application, putting to practical use, applied (e.g. physics, linguistics, research)
適応【てきおう】
adaptation, accommodation, conformity
応答【おうとう】
reply, answer, response
応接【おうせつ】
reception (e.g. of visitors), dealing with
応対【おうたい】
dealing with (people, customers, complaints, etc.), receiving (callers, visitors, etc.), attending to, handling, serving
呼応【こおう】
hailing each other, acting in concert, responding (to), sympathizing (with), agreement, concord
応酬【おうしゅう】
exchange (of words, views, punches, cups, etc.), give-and-take, reply, answer, response, reciprocation, retort, riposte, tit for tat
相応【そうおう】
suitable, appropriate, befitting, becoming, adequate, reasonable, proper, conjoining, association, samprayukta
応ずる【おうずる】
to answer, to respond, to meet, to satisfy, to accept
順応【じゅんのう】
adaptation, accommodation, conforming, adjustment, acclimatization, acclimatisation
不相応【ふそうおう】
unsuited, inappropriate, improper, undeserved
応召【おうしょう】
responding to a call-up for military service, answering a call-up