Kanji grouped under the onyomi reading "ゴウ".

Onyomi: ゴウ

合 — fit, suit, join, 0.1
業 — business, vocation, arts, performance
強 — strong
格 — status, rank, capacity, character, case (law, grammar)
楽 — music, comfort, ease
号 — nickname, number, item, title, pseudonym, name, call