How To Spell observed?

Correct spelling: observed

Google Ngram Viewer results for observed:

This graph shows how "observed" have occurred between 1800 and 2008 in a corpus of English books.

What are the rhymes for observed?

  1. swerved, curved, served;
  2. unnerved, conserved, deserved, preserved, reserved;
  3. underserved, undeserved;