Shirabe
重なる

重なるかさなる

Common Godan Intransitive
English jmdict
1
Godan verb with 'ru' endingintransitive verb to be piled up;to lie on top of one another
2
Godan verb with 'ru' endingintransitive verb to come one after another;to happen over and over;to pile up (e.g. stress);to accumulate
3
Godan verb with 'ru' endingintransitive verb to overlap (each other);to occur at the same time;to happen simultaneously
私の誕生日とあなたの誕生日が、偶然重なる。
My birthday coincides with yours.

主なるおもなる

Expression pre-noun adjectival (rentaishi)
English jmdict
1
expressions (phrases formal or literary term main;principal;chief;leading;important
Other forms 重なる 【おもなる】 (rarely used kanji form)