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

ビット毎[bittogoto] bit-wise
丸毎[marugoto] in its entirety
事毎に[kotogotoni] in everything
日毎に[higotoni] daily

年毎に[toshigotoni] annually
半年毎に[hannengotoni] semiannually
毎に[gotoni] one by one
毎回[maikai] every time