Kanji grouped under the onyomi reading "コン".

Onyomi: コン

今 — now
金 — gold
近 — near, early, akin, tantamount
建 — build
根 — root, radical, head (pimple)
献 — offering, counter for drinks, present, offer
婚 — marriage
混 — mix, blend, confuse
困 — quandary, become distressed, annoyed