Idonomia

Idonomia refers to words that share an identical, or very similar meaning. i.e., Saint, holy...Intelligent, smart...Delighted, overjoyed.
Adjective: Idonomic.
Adverb: Idonomically

We can observe great idonomia in the English language due to the different roots the modern language stems from. For example, the word smart and intelligent share an identical meaning, but one is of Germanic origin, whereas the second one is of Latin origin...