"Kindred" refers things, thoughts,
feelings, or especially people, that are in some
way related or have significant similarities (usually
re: ideas or experiences, not in appearances).
--Related--
"I'm going back East to visit my kindred on my
mother's side of the
family."
--Significant Similarities--
"We
felt a special connection when we first met; we soon realized we were Kindred Spirits."
"This group of documentaries have a kindred theme."