孤独感

こどくかん

sense of isolation, (feelings of) loneliness

孤独死

こどくし

dying alone (esp. of someone who lives alone and dies of natural causes at home without anyone knowing), solitary death

鰥寡孤独

かんかこどく

with no one upon whom to depend, utter loneliness, the lonely and the helpless, people who have no kith or kin

天涯孤独

てんがいこどく

a person without a single relative

百年の孤独

One Hundred Years of Solitude (1967 novel by Gabriel García Márquez)

相場師は孤独を愛す

そーばしはこどくをあいす

(market maxim) wise investors love solitude (meaning good investors won't be swayed by the masses)

孤

こ

being alone; solitude; loneliness

孤帆

こはん

solitary sailboat

孤絶

こぜつ

to become isolated, to become separated

孤弱

こじゃく

young orphan

孤塁

こるい

isolated stronghold

孤城

こじょう

solitary castle, isolated castle

孤猿

こえん

lone monkey, stray monkey

孤軍

こぐん

lone (isolated) force, forlorn force

孤影

こえい

lonely figure

孤剣

こけん

sole sword, unarmed but for a sword

孤雁

こがん

solitary wild goose (i.e. separated from its flock, esp. flying)

孤児

こじ みなしご

orphan

孤灯

ことう

solitary light