relation vs offspring

relation and offspring both are nouns.

Word	Noun	Adjective	Verb	Adverb
relation	Yes	No	No	No
offspring	Yes	No	No	No

As nouns, offspring is a hyponym of relation; that is, offspring is a word with a more specific, narrower meaning than relation:

relation (noun)	offspring (noun)
an abstraction belonging to or characteristic of two entities or parts together	any immature animal
(usually plural) mutual dealings or connections among persons or groups	something that comes into existence as a result
sexual activity between individuals, especially the insertion of a man's penis into a woman's vagina until orgasm and ejaculation occur	the immediate descendants of a person
(law) the principle that an act done at a later time is deemed by law to have occurred at an earlier time
an act of narration
a person related by blood or marriage