33 Old HSK word(s): ☊同时 ** A ☊同学 ** A ☊同意 ** A ☊同志 ** A ☊不同 ** A ☊同屋 ** B ☊同样 ** B ☊共同 ** B ☊相同 ** B ☊一同 ** B ☊合同 ** B ☊同 ** B ☊同 ** B ☊同情 ** B ☊如同 ** C ☊陪同 ** C ☊胡同 ** C ☊同伴 ** C ☊同胞 ** C ☊同盟 ** C ☊同事 ** D ☊同一 ** D ☊会同 ** D ☊赞同 ** D ☊大同小异 ** D ☊与此同时 ** D ☊连同 ** D ☊同步 ** D ☊同等 ** D ☊同行 ** D ☊同类 ** D ☊同年 ** D ☊同期 ** D
伴同* * 不敢苟同* * 不约而同* * 等同* * 苟同* * 混同* * 伙同* * 迥然不同* * 雷同* * 类同* * 略同* * 认同* * 撕毁合同* * 死胡同* * 随同* * 同* * 偕同* * 协同* * 英雄所见略同* * 异同* * 有所不同* * 与众不同* *

Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.

与 and / with / to / for / give, grant
众 multitude, crowd / masses, public
不 no, not / un- / negative prefix
同 same, similar / together with
Hsk Characters: 同 *
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual
同 540C + 同 + + same, similar / together with 口 同 Mouth 同 (IDENTISCH) tong2 +

Korean:

同 + 同 같을 동 or 한가지동(한가지: one and the same)
仝 + 同 同의 古字
13 NHSK word(s): 同学* 1 tong2 xue2(fellow) classmate/ CL:位[wei4];個|个[ge4] 同事* 3 tong2 shi4colleague/ co-worker/ CL:個|个[ge4];位[wei4] 同意* 3 tong2 yi4to agree/ to consent/ to approve 相同* 3 xiang1 tong2identical/ same 同情* 4 tong2 qing2compassion/ relent/ sympathize/ sympathy 共同* 4 gong4 tong2common/ joint/ jointly/ together/ collaborative 胡同* 5 hu2 tong4lane/ alley/ CL:條|条[tiao2] 同时* 5 tong2 shi2at the same time/ simultaneously 合同* 5 he2 tong5(business) contract/ CL:個|个[ge4] 连同* 6 lian2 tong2together with/ along with 同胞* 6 tong2 bao1born of the same parents/ fellow citizen or countryman 同志* 6 tong2 zhi4comrade/ homosexual (slang)/ CL:個|个[ge4] 赞同* 6 zan4 tong2to approve of/ to endorse/ (vote) in favor/ trad. also written 贊同
KOREAN6000 word(s):
7 KOREAN 2500 New HSK words):
同学 + tóngxué 급우.학우 geub-u.hag-u
合同 + hétong 계약서. gyeyagseo.
胡同 + hútòng 골목. golmog.
共同 + gòngtóng 공동의. 공통의. gongdong-ui. gongtong-ui.
同情 + tóngqíng 동정하다. dongjeonghada.
同时 + tóngshí 동시. 같은 시간. 동일한 시기. 같은 때. dongsi. gat-eun sigan. dong-ilhan sigi. gat-eun ttae.
相同 + xiāngtóng 서로 같다. 똑같다. 일치하다. seolo gatda. ttoggatda. ilchihada.
1 KOREAN Sentence(s):
我的同事们很友好。 + 저는 좋은 동료들이 있어요. jeoneun choheun dongryodeu-ri isseoyo.