共に【ともに】
together, jointly, at the same time, with, as ..., including, along with, both
と共に【とともに】
together with, as X, then Y (e.g. as we age we gain wisdom, as wine matures it becomes more valuable, etc.)
共有【きょうゆう】
joint ownership, co-ownership, sharing (e.g. a viewpoint), sharing (files, devices on a network, posts on social media, etc.)
共同【きょうどう】
cooperation, collaboration, association, partnership, (acting in) unison, community, communal use, common possession, sharing
共感【きょうかん】
sympathy, empathy, response, identification (with someone)
共通【きょうつう】
common, shared, mutual, to be common (to), to be shared (by), -wide
共通点【きょうつうてん】
point in common, common feature
共演【きょうえん】
appearing together (in a film, play, etc.), performing together (at a concert, etc.), acting together, co-starring, playing together (in a sports match)
共和党【きょうわとう】
Republican Party
公共【こうきょう】
public (facilities, service, etc.), communal
共産主義【きょうさんしゅぎ】
communism, collectivism
共存【きょうぞん】
coexistence
共働き【ともばたらき】
(husband and wife) both working, dual income
共用【きょうよう】
common use, communal use, sharing
共和国【きょうわこく】
republic, commonwealth
共通語【きょうつうご】
common language, lingua franca, standard language (language variety understood throughout a country)
共稼ぎ【ともかせぎ】
(husband and wife) earning a living together
グアテマラ共和国【グアテマラきょうわこく】
Republic of Guatemala
共産党【きょうさんとう】
Communist Party
共同体【きょうどうたい】
cooperative body, cooperative system, collective, community