葱 ⇒
洋葱 yángcōng, [洋蔥], onion (Allium cepa)/bulb onion
葱 cōng, [蔥], scallion/green onion
大葱 dàcōng, [大蔥], leek/Chinese onion
葱花 cōnghuā, [蔥花], chopped onion
葱郁 cōngyù, [蔥鬱], verdant/lush green and full of life
青葱 qīngcōng, [青蔥], scallion/green onion/verdant/lush green
郁郁葱葱 yùyùcōngcōng, [鬱鬱蔥蔥], verdant and lush (idiom)
葱茏 cōnglóng, [蔥蘢], verdant and lush
葱葱 cōngcōng, [蔥蔥], verdant and thick (foliage, grass etc)
葱翠 cōngcuì, [蔥翠], fresh green