The best replacement for only child is siblings.

The best alternatives to only child are rated as following:
★★★★★  siblings
★★  multiple children
★★  two children
★  first born
★  child with siblings
★  have siblings
★  sibling
★  children with siblings
★  youngest child
★  having siblings
  multiple siblings
  to have siblings
  middle child
  second child
  many siblings
  having sibling
  have a sibling

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

Other search terms related to only child and their ratings are:
★★★★★ middle child
★★ older parents
★★ single parent
★ first born
★ only child
You have in mind a companion for only child and it is not yet here? Propose!



Google Trends

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