The best replacement for phrase is clause.

The best alternatives to phrase are rated as following:
★★★★★  clause
★★★★  sentence
★★★  clause quiz
★  term
★  dependent clause
★  saying
★  dependent (subordinate) clause
  fragment
  words
  phrase
  quote
  expression
  prepositional phrase
  sentence worksheet
  idiom
  adverb phrase
  phase
  gerund phrase
  noun clause
  word
  preposition
  participial phrase
  infinitive phrase
  verb phrase
  scrabble catch phrase
  adjective phrase
  slogan
  adverb
  clauses
  adjective clause
  infinitive

Your alternative for phrase is not listed? Suggest!
Speaking about phrase, one probably shouldn't forget about stronger reason.

Other search terms related to phrase and their ratings are:
★★★★★ stronger reason
★★★★★ subject
★ comma
★ gerund
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phrase
clause
sentence