It seems that your "fuzzy" regex isn't much different from just using dot and the length of the target. That is: 

#!/usr/bin/perl -w
use strict;
use lib '.';
use Regexp::Approx 'fuzzy_qr';
use re 'eval';

while(<DATA>) {
    chomp;
    print "Using '$_' as fuzzy component:\n";
    my $fuzzy_part = fuzzy_qr( $_ );
    my $rx = qr/((?:$fuzzy_part\s)?\w+\d)$/;
    if ( "5678 DELAWARE AVENUE AOT 123" =~ $rx ) {
        print "\tRX Match: $1\n";
    }
    my $really_fuzzy = '.{' . length($_) . '}';
    my $rfx = qr/((?:$really_fuzzy\s)?\w+\d)$/;
    if ( "5678 DELAWARE AVENUE AOT 123" =~ $rfx ) {
        print "\tRFX Match: $1\n";
    }
}
__END__
APT
XXX
^%@#!(
fuzzy matches anything?
x

# output:
Using 'APT' as fuzzy component:
        RX Match: AOT 123
        RFX Match: AOT 123
Using 'XXX' as fuzzy component:
        RX Match: AOT 123
        RFX Match: AOT 123
Using '^%@#!(' as fuzzy component:
        RX Match: UE AOT 123
        RFX Match: UE AOT 123
Using 'fuzzy matches anything?' as fuzzy component:
        RX Match: 678 DELAWARE AVENUE AOT 123
        RFX Match: 678 DELAWARE AVENUE AOT 123
Using 'x' as fuzzy component:
        RX Match: T 123
        RFX Match: T 123

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In reply to Re: Regexp::Approx - Use fuzzy regular expressions by Anonymous Monk
in thread Regexp::Approx - Use fuzzy regular expressions by diotalevi

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