Words the Bible translates as hemlock

English uses one word here. The Bible uses 2 words, and they do not mean the same thing. Each is listed with what it actually means, most frequent first.

roshרֹאשׁpoison: a bitter, deadly substance, whether the plant that yields it, the drink brewed from it, or the venom of a snake
la'anahלַעֲנָהwormwood: a bitter desert shrub, used in the Bible only as an image of ruinous bitterness, the taste of judgment or of justice gone poisonous

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Every English meaning beginning with H is on its letter page, and the whole index starts at Browse.