Noun
uncle
Honorific or respectful (sonkeigo) languageFamiliar languageUsually written using kana alone伯父さん is older than one's parent and 叔父さん is younger
old man; mister
Familiar languageUsually written using kana aloneusu. 小父さん or おじさん; vocative
manybar goatfish (Parupeneus multifasciatus)
Usually written using kana aloneusu. オジサン
Also written 叔父さん【おじさん】、小父さん【おじさん】