同等

N1 混同 kondou confusion, mixing, merger N1 同調 douchou sympathy, agree with, alignment N1 同封 doufuu enclosure (e.g., in a letter) N1 同盟 doumei alliance, union, league N1 一同 ichidou all present, all concerned, all of us N1 同い年 onaidoshi of the same age N1 同意 doui agreement, consent; same meaning N1 同感 doukan agreement, same opinion, same feeling N1 等級 toukyuu grade, class

N4 同 dou / ona.ji same, agree, equal N3 等 tou / hito.shii, nado, -ra etc., and so forth, class (first)