Praxis is a German word (hence its use by Karl Marx) with several meanings, all of which make it a good word for the examples above. Here are some of the German uses;

Arztpraxis; the location where a doctor or a group of doctors ply their business. empfohlene Praxis; the recommended way of doing something Praxisjahr; on-the-job training, internship for one year

(Not normally used for practicing something, that is Uebung.)

As said above, Kim Stanley Robinson used it in the Mars books, one example of Robinson actually getting German right. And it is a natty word with an x in the middle.

Praxis is a German word (hence its use by Karl Marx) with several meanings, all of which make it a good word for the examples above. Here are some of the German uses;

Arztpraxis; the location where a doctor or a group of doctors ply their business. empfohlene Praxis; the recommended way of doing something Praxisjahr; on-the-job training, internship for one year

(Not normally used for practicing something, that is Uebung.)

As said above, Kim Stanley Robinson used it in the Mars books, one example of Robinson actually getting German right. And it is a natty word with an x in the middle.

Edit: In the book it is first introduced as the name of a Swiss organisation