fervent — having or showing great warmth or intensity of spirit, feeling, enthusiasm, etc.; ardent: a fervent admirer; a fervent plea.
servant — a person employed by another, especially to perform domestic duties.
Three-syllable rhymes
bond servant — a person who serves in bondage; slave.
Four-or-more syllable rhymes
civil servant — A civil servant is a person who works in the Civil Service in Britain and some other countries, or for the local, state, or federal government in the United States.
public servant — a person holding a government office or job by election or appointment; person in public service.