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

五稜郭[goryoukaku] five-sided fortification
五稜堡[goryouho] five-sided fort
三稜鏡[sanryoukyou] prism
山稜[sanryou] mountain ridge

稜線[ryousen] ridgeline
気骨稜稜[kikotsuryouryou] (a person with) strong moral fiber (backbone, determination)
三稜草[mikuri] branched bur-reed (Sparganium erectum)
稜角[ryoukaku] corner