When it comes to asymmetrical phrases on relations, many of the best examples are just a tiny bit asymmetrical.
A Waypoint is first in a Route, but a Route starts with a Waypoint.
Remember to keep your phrases in the domain you’re modelling. Cort’s example of “owns”/”transports” somewhat mixes two things into the same relation. The ownership of a car is one kind of a relation to a Person, the actual ongoing transportation of Persons are another thing.
When trying to decide if phrases are correctly paired, I try to read it in one direction and then in the other and see if the statements contradict, have nothing to do with each other, or if they supports each other. Non-supporting phrases is an indication of domain mixup in the relation.