質量 ( しつりょう ) mass
地球の質量はほとんど六ヨッタキログラムだ
運搬船（うんぱんせん）freight ship
wow, I thought for 経緯 the common reading is けいい, but the one you listed is the more common one. Thank you for that.
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and I guess I listed a word ending with ん, damn 
New round:
誤り（あやまり）a mistake
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料理（りょうり）cooking
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立派（りっぱ）fine/handsome
パチンコ
酵素（こうそ）- enzyme
@Vrtulniky I’m still learning myself, I think it will just take more exposure. Seems like they overlap quite a bit but this is my understanding of the nuance based on the sources below and asking a native as well:
いきさつ - reason why it got there or order of events (how and the whole story), feels a bit more personal in usage
けいい - more likely in academic/business/medical/science settings (literal formula), directional based, nuance can change depending on context a bit more, reason for a certain result
I just skimmed the sources looking for differences, there may be more.
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創立 （そうりつ）Founding/Organization
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つもり - intention, plan
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リンゴ - apple
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極楽（ごくらく）paradise
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クツワムシ - a type of katydid
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品物ーしなもの, product, article
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脳みそ - brain
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空ーそら, sky
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海獺(らっこ) sea otter
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氷 （こおり）Ice
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理想的 りそうてき ideal
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気持ちいい きもちいい a good feeling
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居間 （いま）Living Room/Sitting Room (western style house)
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