Added 9 October 2026 lynchpin noun Categories: Mind & IdeasThingsObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about lynchpin at Wordnik → Where our words come from → A central cohesive source of support and stability. faith is his anchor Pin inserted through an axletree to hold a wheel on. Related Words: linchpinanchormainstaybackboneaxlecanopyshaftspindlecountershaftfulcrumcentrepiecepivot Back to today's word