Based on your store location, some titles will say “Deliver” instead of “Ship”. Whatever your checkout says, you need to make your code say this. Replace as needed in order to customise the text for your WooCommerce store.
add_filter( 'gettext', 'ecommercehints_change_ship_address_heading', 999, 3 );
function ecommercehints_change_ship_address_heading( $translated, $untranslated, $domain ) {
if ( ! is_admin() && 'woocommerce' === $domain ) {
switch ( $translated ) {
case 'Deliver to a different address?':
$translated = 'Send it somewhere else?';
break;
}
}
return $translated;
}