共存: coexist

恐喝: intimidation, threat; blackmail / 脅喝: intimidation

恐喝: to intimidate, to threaten; to blackmail / 脅喝: to intimidate

共和: collaboration; republicanism / 協和: cooperation, concord

協和: to be in concord

強要: to compel, to coerce, to exact / 教養: to edify / 共用: to share something used by all parties / 供用: to provide for the use of others

強要: coercion, a demand / 教養: cultivation, refinement, education / 共用: shared use, common use / 供用: provision for others

Synonym of 効果音 (kōkaon, “sound effect”)

research & development; R&D

(education) research project, done by Japanese schoolchildren during summer break, to be presented upon return to school