於多福[otafuku] homely woman (esp. one with a small low nose, high flat forehead, and bulging cheeks)
圧倒的多数[attoutekitasuu] overwhelming numbers
一妻多夫[issaitafu] polyandry
一番多い[ichibanooi] most numerous
一夫多妻[ipputasai] polygamy

引く手数多[hikuteamata] being very popular
過多[kata] excess
幾多[ikuta] many
ご多忙中[gotabouchuu] in the midst of your work (often used as a formal phrase in business letters, etc.)
好事魔多し[koujimaooshi] Lights are usually followed by shadows

幾つも[ikutsumo] many
越幾斯[ekisu] extract (esp. of food, fruit, etc.)
沃度丁幾[youdochinki] tincture of iodine
位相幾何学[isoukikagaku] topology
幾つ[ikutsu] how many?

幾つか[ikutsuka] (a) few
幾ら[ikura] how much?
幾らか[ikuraka] some
幾何[kika] geometry