As nouns the difference between relatives and nonkin
is that relatives is while nonkin is a group of people who are not one's relatives (not kin).
relatives
English
Noun
(head)
Anagrams
*
*
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nonkin
English
Alternative forms
*non-kin
Noun
(-)
A group of people who are not one's relatives (not kin)
Derived terms
*nonkinship