child vs male offspring

child and male offspring both are nouns.

Word	Noun	Adjective	Verb	Adverb
child	Yes	No	No	No
male offspring	Yes	No	No	No

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

Other hyponyms of child include army brat, babe, baby, infant, female offspring, man-child, stepchild.

child (noun)	male offspring (noun)
a young person of either sex	a child who is male
a human offspring (son or daughter) of any age
an immature childish person
a member of a clan or tribe