Got another one, and it’s one that programmers should know, IMO. Within CompSci it can be used to denote that things are interdependent on each other in different ways. Connascence of name, connascence of meaning, etc. Makes you think about the complexity of software that you’re building. Props to Jim Weirich (RIP 2014) for doing a presentation on this.

Connascence:

• the simultaneous birth of two or more things
• the act of growing at the same time