うんちく【蘊蓄を傾けて】 with one's rich[profound]knowledge.

うんちん【運賃】 [旅客の]a (passenger) fare;[貨物の]freight[<英>goods]rates;carriage;→英和 shipping expenses.‖運賃後払い freight to collect.運賃先(方)払 carriage[freight]forward.運賃支払済 carriage[freight]paid.運賃精算所 a fare adjustment office.

うんでい【雲泥の差がある】 There is a great[marked,radical,tremendous]difference.