-id vs -oid

-id

suffix
  • of or pertaining to; appended to various foreign words to make an English adjective or noun form. Often added to words of Greek, sometimes Latin, origin. 

  • Forming nouns from Latin or Greek roots, including certain plant names modelled on Latin sources. 

  • Forming common names of members of a taxon which has a name ending in -idae. 

  • Forming names of dental features found in lower (mandibular) teeth. 

  • Forming the names of certain dynasties of Asia and Africa, being suffixed to the name of their progenitors and meaning "descendant(s) of". 

  • Forming common names of meteors from their apparent constellation of origin. 

-oid

suffix
  • Of, pertaining to, or related to. 

  • Resembling; having the likeness of (usually including the concept of not being the same despite the likeness, but counterexamples exist). 

  • Added to nouns to create derogatory terms, typically referring to a particular ideology or group of people, by means of analogy to psychological classifications such as schizoid. 

How often have the words -id and -oid occurred in a corpus of books? (source: Google Ngram Viewer )