Words the Bible translates as make straight

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.

yasharיָשַׁרto be or go straight and level, and so to be right or pleasing; also to make a path straight, smooth, or direct
palasפָּלַסto bring something to true level, as a balance beam or a builder's level does: to grade a path smooth, or to weigh a thing out and size it up

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