１月[ichigatsu] January
ひと月[ichigetsu] one month
下弦の月[kagennotsuki] waning moon
何ヶ月[nankagetsu] how many months?
何月[nangatsu] what month

佳月[kagetsu] good month
か月[kagetsu] (number of) months
花鳥風月[kachoufuugetsu] beauties of nature
各月[kakugetsu] every month
隔月[kakugetsu] every second month

柑橘類[kankitsurui] citrus fruits
金橘[kinkan] kumquat (Fortunella spp.)
枸橘[karatachi] trifoliate orange (Poncirus trifoliata)
酢橘[sudachi] sudachi (species of Japanese citrus, Citrus sudachi)
橘鳥[tachibanadori] lesser cuckoo (Cuculus poliocephalus)

右近の橘[ukonnotachibana] tachibana tree west of the southern stairs of the Hall for State Ceremonies (in Heian Palace)
橘月[tachibanazuki] fifth lunar month
橘神道[tachibanashintou] Tachibana Shinto (Edo-period sect of Suika Shinto popularized by Mitsuyoshi Tachibana)
臭橘[shuukitsu] trifoliate orange (Poncirus trifoliata)