九寸五分[kusungobu] dagger
弦楽五重奏曲[gengakugojuusoukyoku] string quintet
五つ[itsutsu] five
五つ子[itsutsugo] quintuplets
五悪[goaku] the five sins in Buddhism (murder, theft, adultery, falsehood and drink)

五音々階[goononkai] pentatonic scale
五戒[gokai] the five precepts (prohibitions against killing, theft, sexual misconduct, lying and intemperance)
五官[gokan] the five sense organs
五感[gokan] the five senses

余蘊[youn] inexhaustible supply
蘊蓄[unchiku] great erudition
蘊奥[unnou] inner mysteries (of a field of study)
受蘊[juun] perception

蘊蓄を傾ける[unchikuwokatamukeru] to draw upon one's profound knowledge
蘊奥を究める[unnouwokiwameru] to master the secrets of
海蘊[mozuku] mozuku (Cladosiphon okamuranus and Sphaerotrichia divaricata, types of edible seaweed)
五蘊[goun] the five skandhas (the five aggregates: matter, sensation, perception, mental formations and consciousness)