Split string by newline and space in Bourne shell

I'm c开发者_开发百科urrently using the following to split a file into words - Is there some quicker way?

while read -r line
do
    for word in $line
    do
        words="${words}\n${word}"
    done
done

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What about using tr?

tr -s '[:space:]' '\n' < myfile.txt

The -s squeezes multiple whitespace characters into one.

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xargs -n 1  echo <myfile.txt

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sed 's/[[:space:]]/\n/g' file.txt