Barnicle rhymes with:
botanical, chronicle, conical, cynical, ecumenical, electromechanical, ethnical, galenical, grossnickle, ironical, mechanical, monical, nontechnical, preclinical, puritanical, rabbinical, senecal, senechal, technical, tyrannical
Barnicle sounds like:
barnacle, brengle, bringle, brinkley, brinkly, bronchial, brunskill