講堂 (こうどう)auditorium; lecture hall

講堂, its kanji, and other words that share them.Open this graph

Kanji in 講堂

講演こうえんlecture; address
講師こうしlecturer
講座こうざcourse (e.g. of lectures)
受講じゅこうtaking a lecture; attending a class
講義こうぎlecture
講習こうしゅうshort course; training
講談こうだんstorytelling (of war chronicles, revenge tales, etc.) with highly dramatic delivery; story
講ずるこうずるto take measures; to work out a plan
食堂しょくどうdining room; dining hall
堂々どうどうmagnificent; grand
一堂いちどうone building (hall, temple, shrine, room)
公会堂こうかいどうtown hall; public hall
会堂かいどうchurch; chapel
堂どうtemple; shrine
殿堂でんどうpalace; hall
聖堂せいどう(Confucian) temple; church

See how 講堂 connects to the rest of Japanese.