The best replacement for child is siblings.

The best alternatives to child are rated as following:
★★★★★  siblings
★★★★★  two
★★★  adolescent
★★★  gifted child
★★  multiple children
★★  kid
★  drunk
★  serial killer
★  descendant
★  offspring
★  child with siblings
★  minor
★  infant
★  child's
★  dreamer
★  qualifying relative
★  ward
★  nirvana
★  bright child
★  parent
★  infant cpr
★  artist
  tlc
  adhd
  abuse
  gifted learner
  2 children
  child's grammar
  two children
  having sibling
  stepchild
  child annoying
  child
  second child
  having siblings

Your alternative for child is not listed? Suggest!
Speaking about child, one probably shouldn't forget about fever.

Other search terms related to child and their ratings are:
★★★★★ fever
★★★★ parents
★★★ father
★ pneumonia
★ add
★ fever and cough
★ fail
★ cough
★ limits
★ marriage
★ sensory issues
★ fever and headache
★ stiff neck
★ mother
fever for 5 days
parent
rash
You have in mind a companion for child and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of child in all years. Click on graph for more.
child
siblings
two