C33 or C-33 may refer to:
== Vehicles == Aircraft Beechcraft C33 Debonair, an American civil utility aircraft Boeing C-33, a proposed American military transport Caspar C 33, a German trainer Caudron C.33, a French passenger biplane Douglas C-33, an American military transport Automobiles Nissan Laurel C33, a Japanese sedan Sauber C33, a Swiss Formula One car Ships , a C-class submarine of the Royal Navy
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).