#!/bin/sh

WORDFILE="/usr/share/dict/words"
NUMWORDS=5

#Number of lines in $WORDFILE
tL=`awk 'NF!=0 {++c} END {print c}' $WORDFILE`

for i in `seq $NUMWORDS`
do
rnum=$((RANDOM%$tL+1))
sed -n "$rnum p" $WORDFILE
done