アラビア数字[arabiasuuji] Arabic numeral
キリル文字[kirirumoji] Cyrillic character
ギリシア文字[girishiamoji] Greek character
羅馬字[roomaji] Latin alphabet
ロシア文字[roshiamoji] Russian character

異体字[itaiji] kanji variants
一字[ichiji] letter
一字千金[ichijisenkin] word of great value
一丁字[itteiji] single letter or character
一文字[ichimonji] straight line

篆書[tensho] characters used on seals
篆刻[tenkoku] seal engraving
篆字[tenji] seal script character

篆隷[tenrei] seal style and ancient square style
大篆[daiten] large seal script (dating from China's Spring and Autumn period onward)
小篆[shouten] small seal script (arising during China's Warring States period)