おかあさん
mother (formal)
おばさん
aunt
はは
(my) mother
そぼ
grandmother
ははおや
mother
おば
(humble) aunt (older than one's parent)
aunt (younger than one's parent)
ふぼ
father and mother, parents
ぶんぼ
denominator
ぼこう
alma mater
ぼこく
one's home country (same as 自分の国 (じぶんのくに))