COINCIDE, COINCIDING, COINCIDENCE
ADJECTIVES
1581 — JUMP coinciding, exactly agreeing; exact, precise → obs.
ADVERBS
1539 — JUMP with exact coincidence or agreement; exactly, precisely → obs.
NOUNS
1858 — NECK-AND-NECK an exact coincidence
1905 — HAPPEN-CHANCE a coincidence; a chance or accidental occurrence → Eng. & Amer. dial. (Bk.)
1908 — HAPPEN-SO a coincidence; a chance or accidental occurrence → Amer. dial.
1990 — QUINKYDINK a coincidence → US teen sl.
2006 — COINCIDINK — COINKIDINK a coincidence → US students’ sl. (Bk.)
VERBS
1657 — COINCIDATE to coincide → obs.
1880 — QUEEM to coincide with; to fit snugly, to fall into place → Sc.
Lexicophilia 