ways two things can be related

How many different ways are there for two things to be related? Billions, probably. I'm trying to make a short list of the most common ways:

identical: two things can be the same, as in "a cat is the same thing as a feline".

sequential: one thing can come before/after another, as in "the letter A comes before the letter B".

belongs to: (aka part of, kind of, quality of, child of) one thing can be a part of another, or a container for another, as in "a leg belongs to a body, or a body contains a leg", or "a cat belongs to the family of mammals", or "the color green belongs to/is a quality of a leaf"

substitutes: (opposites is a subset of this) one thing can be the reverse of another, as in "good is the opposite of evil", or one thing can be replaced by another, as in "a heater can be replaced by a good sweater"

complements: one thing goes well with another, as in "gin goes well with tonic".

caused by: (aka formed by, dependent upon) one thing is formed by another, as in "this book was written by this author", or "this canyon was created by this river", or "my sadness was caused by the break-up".

What am I missing here? Is there a name for the list of these things?

Comments

[Joe]

The OO programer in me immediately thought of "is a" ("cat is an animal") and "has a" ("cat has a tail") which could be part of your concept of "belongs to". I would separate the "has a" quality from the "property of" quality in your "belongs to" grouping.

[Erik Benson]

Yeah, I was thinking the same thing. Though they are both about sets containing subsets, they work on different dimensions of the object. For example, an oar is a tool, but an oar belongs to a row boat.