本の[honno] mere
異本[ihon] different edition
一坪本社[hitotsubohonsha] small company headquarters located in Tokyo simply for name value
一本[ippon] one long cylindrical thing
一本気[ippongi] single-minded (esp. personality or person)

一本橋[ipponbashi] (a) log bridge
一本建て[ippondate] (a) single standard
一本松[ipponmatsu] solitary pine tree
一本杉[ipponsugi] (a) solitary cryptomeria tree
一本槍[ipponyari] guiding principle

ト音記号[toonkigou] G clef
ハ音記号[haonkigou] C clef
ヘ音記号[heonkigou] F clef
哀音[aion] sad voices
異音[ion] allophone

異句同音[ikudouon] in concert
異口同音に[ikudouonni] in one voice
一音節[ichionsetsu] monosyllable
一口同音[ikkudouon] reading in unison
羽音[haoto] sound of flapping wings (of a bird)