| ancient, aunchient | long-established, long-standing |
| approved | tested, tried, established, proven |
| customed | legally sanctioned, established by custom |
| duello | established duelling code |
| fixed | rooted, established, in place |
| frame | plan, established order, scheme of things |
| grandsire | long-established, old-fashioned |
| grounded | firmly established, deep-rooted, strongly founded |
| pre-ordinance | pre-ordained law, previously established ordinance |
| regular | established, prescribed, constituted |
| root | grow, be established, flourish |
| seasoned | established, settled, mature |
| settled | fixed, established |
| true-fixed | firmly established, immovable, unwavering |
| well-found | of proven merit, of established reputation, commendable |