Exploring the different kinds of mentors there are... We either do these things for others or we seek them for ourselves.
Continuing with "J":
Judgment-or: We’re all good at this to differing degrees.
Jument-or: Teaches us to delegate
Continuing with “K” (with thanks to Karin):
"Kidment": a pocket hankerchief fastened to the pocket and partially hung out to entrap thieves. Also a fictious story to deceive the unwary, a begging letter, a long rigamarole of any kind = Kidment-or: someone who helps you look for the weak spots in your plan.
How about knurlment, which does not technically appear in dictionary but is a technical term for something to do with the design of twist off caps. = Knurlment-or: a good drinking buddy.
"Knackerment" after one has recovered from being knackered, one discusses the issues that arose whilst in a state of knackerment. Still it is not listed in a dictionary yet as a variation of knackered. = Knackerment-or: they know how to do a really good debrief