Command line random word generator

random_word.sh

#!/bin/bash

DICT="/usr/share/dict/words"

NUM_WORDS=$(wc -l $DICT | awk -F " " '{print $1}')
NUM_DIGITS=${#NUM_WORDS}

while true
do
	NUM=""
	for ((i=0; i<$NUM_DIGITS; i++))
	do
		DIGIT=$(($RANDOM%10))
		NUM="$NUM$DIGIT"
	done

	if [ $NUM -le $NUM_WORDS ]
	then
		break
	fi
done

WORD=$(head -n $NUM $DICT |tail -n 1)

echo $WORD