白

white bush clover

Lysimachia fortunei (species of loosestrife)

melon cucumber

swan song

white magnolia (Magnolia denudata); lilytree; Yulan magnolia

Yojijukugo

being fast asleep (and totally unaware of what is going on around one)

know-it-all manner

white race

Word usually written using kana alone

bai zhi (Chinese name for angelica species Angelica dahurica); traditional Chinese cure made from the root of this plant

Heracleum nipponicum (species of hogweed)

white mouse; white rat

blank power of attorney; carte blanche

blank ballot; white ballot

white goods; large household electrical appliances; whiteware

refined rice flour; rice flour for dumplings

white label; white tag

white card (in karuta); blank card

honour awarded to samurai in Tosa

carte blanche; blank check; blank cheque; unconditional authority

ermine

silver-lipped pearl oyster (Pinctada maxima); golden-lipped pearl oyster; white-lipped pearl oyster

white cloth or kimono with black or indigo splash patterns

Nouns which may take the genitive case particle 'no'

white spot

はくはん only

bright spot; facula

はくはん only; Medicine

vitiligo; leukoderma; leukoma

Biology

leucism; pigmentation loss

any butterfly of family Pieridae (incl. the white butterflies and the sulfur butterflies)

nickel coin

'taru' adjective

openly and in broad daylight

beluga (Delphinapterus leucas); white whale; beluga whale

black-and-white television