child

Rendered as child 77 times in KJV, and as son 21 times.  

teknon/a child/τέκνον/tek'-non  
From the base of G5098; a child (as produced): - child, daughter, son.

Uihos/Hweeos indicates maturity. Teknon indicates immaturity.  

Teknon indicates a different level of maturity when compared to uihos (hweeos).  
 
paidion/a childling/Παιδίον/pahee-dee'-on  
Neuter diminutive of G3816; a childling (of either sex), that is, (properly) an infant, or (by extension) a half grown boy or girl; figuratively an immature Christian: - (little, young) child, damsel.  
 
uihos/a "son"/hwee-os'  
Apparently a primary word; a "son" (sometimes of animals), used very widely of immediate, remote or figurative kinship: - child, foal, son.

Strongs:

5043 τεκνον teknon tek'-non  
from the base of 5098; TDNT-5:636,759; n n  
AV-child 77, son 21, daughter 1; 99  
1) offspring, children  
1a) child  
1a) a male child, a son  
1b) metaph.  
1b1) the name transferred to that intimate and reciprocal relationship formed between men by the bonds of love, friendship, trust, just as between parents and children  
1b2) in affectionate address, such as patrons, helpers, teachers and the like employ: my child  
1b3) in the NT, pupils or disciples are called children of their teachers, because the latter by their instruction nourish the minds of their pupils and mould their characters  
1b4) children of God: in the OT of "the people of Israel" as especially dear to God, in the NT, in Paul's writings, all who are led by the Spirit of God and thus closely related to God  
1b5) children of the devil: those who in thought and action are prompted by the devil, and so reflect his character  
1c) metaph.  
1c1) of anything who depends upon it, is possessed by a desire or affection for it, is addicted to it  
1c2) one who is liable to any fate  
1c2a) thus children of a city: it citizens and inhabitants  
1c3) the votaries of wisdom, those souls who have, as it were, been nurtured and moulded by wisdom  
1c4) cursed children, exposed to a curse and doomed to God's wrath or penalty  
 
3813-refers exclusively to little children  
3808-refers to a child up to his first school years  
3816-refers to a child of any age  
3814-refers to late childhood and early youth

3813 παιδιον paidion pahee-dee'-on  
from dimin. of 3816; TDNT-5:636,759; n n  
AV-child 25, little child 12, young child 10, damsel 4; 51  
1) a young child, a little boy, a little girl  
1a) infants  
1b) children, little ones  
1c) an infant  
1c1) of a (male) child just recently born  
1d) of a more advanced child; of a mature child;  
1e) metaph. children (like children) in intellect  
 
3808 παιδαριον paidarion pahee-dar'-ee-on  
from a presumed derivative of 3816; TDNT-5:636,759; n n  
AV-child 1, lad 1; 2  
1) little boy, a lad

3816 παις pais paheece  
perhaps from 3817; TDNT-5:636,759; n m/f  
AV-servant 10, child 7, son (Christ) 2, son 1, manservant 1, maid 1, maiden 1, young man 1; 24  
1) a child, boy or girl  
1a) infants, children  
2) servant, slave  
2a) an attendant, servant, spec. a king's attendant, minister

3814 παιδισκη paidiske pahee-dis'-kay  
 
from diminutive of 3816;; n f  
 
AV-damsel 4, bondwomen 4, maid 3, maiden 1, bondmaid 1; 13  
1) a young girl, damsel  
2) a maid-servant, a young female slave  
2a) a maid servant who has charge of the door