異

E.g. 渕 as variant of 淵

variant character; variant form of a character (esp. kanji)

foreign lands

singularity (climate); day in the calendar when a particular weather phenomenon is statistically likely to occur

Chemistry

isomer

variant; variant form

Biology

heteromorphism; heteromorphy

extraordinary talent; genius; prodigy

異材 only

contaminant; different material

miracle; wonder; wondrous thing

another language; different languages

minor difference

unnatural death

differentiation

Medicine

pica; parorexia; allotriophagy

foreigner; expatriate

heterogenous equipment; dissimilar equipment

foreign court; foreign country

person of a different bloodline; person not related by blood

different race; different tribe

natural disaster; calamity

variant (in a manuscript or book); part of a text that differs from other versions

vision; strange phenomenon

Mathematics

nonsingular

allopatry; heterotopy; heterotopia; allopatric; aberrant

dysplasia

different edition (e.g. of a book)

strange custom; quaint custom