Modify the default WooCommerce "Street address" label to something else.

change_street_address_label.php

<?php // only use if needed

function modify_street_address_field_label( $translated_text, $text, $domain ) {
    switch ( $translated_text ) {
        case 'Street address' :
            $translated_text = __( 'Enter your full street address', 'woocommerce' );
            break;
    }
    return $translated_text;
}
add_filter( 'gettext', 'modify_street_address_field_label', 20, 3 );