The best replacement for predicate is subject.

The best alternatives to predicate are rated as following:
★★★★★  subject
★★★★  verb
★★  proposition
★★  func
★★  complete predicate
★★  seek predicate
★  predict
★  simple predicate
★  predicate
★  complement
  lambda
  compound sentence
  compound subject
  action verb
  subject worksheets
  xpath

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

Other search terms related to predicate and their ratings are:
★★★★★ subject
★★ helping verb
★★ linking verb
★ helping verbs
You have in mind a companion for predicate and it is not yet here? Propose!



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predicate
subject
verb