declare vs voice

declare

verb
  • To assert or announce formally, officially, explicitly, or emphatically. 

  • To make outstanding debts, e.g. taxes, payable. 

  • To show one's cards in order to score. 

  • To explicitly establish the existence of (a variable, function, etc.) without necessarily describing its content. 

  • For a constituency in an election to officially announce the result 

  • For the captain of the batting side to announce the innings complete even though all batsmen have not been dismissed. 

  • To inform government customs or taxation officials of goods one is importing or of income, expenses, or other circumstances affecting one's taxes. 

voice

verb
  • To give utterance or expression to; to utter; to publish; to announce 

  • To assign the voice flag to a user on IRC, permitting them to send messages to the channel. 

  • To act as a voice actor to portray a character. 

  • To fit for producing the proper sounds; to regulate the tone of 

  • To utter audibly, with tone and not just breath. 

noun
  • Sound uttered by the mouth, especially by human beings in speech or song; sound thus uttered considered as possessing some special quality or character 

  • The tone or sound emitted by an object 

  • That which is communicated; message; meaning. 

  • Sound made through vibration of the vocal cords; sonant, or intonated, utterance; tone; — distinguished from mere breath sound as heard in whispering and voiceless consonants. 

  • An expressed opinion, choice, will, desire, or wish; the right or ability to make such expression or to have it considered 

  • A particular style or way of writing that expresses a certain tone or feeling. 

  • A particular way of inflecting or conjugating verbs, or a particular form of a verb, by means of which is indicated the relation of the subject of the verb to the action which the verb expresses. 

  • In harmony, an independent vocal or instrumental part in a piece of composition. 

  • A flag associated with a user on a channel, determining whether or not they can send messages to the channel. 

  • One who speaks; a speaker. 

  • The faculty or power of utterance 

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