predominance vs predomination

predominance and predomination both are nouns.

Word	Noun	Adjective	Verb	Adverb
predominance	Yes	No	No	No
predomination	Yes	No	No	No

As nouns, predominance and predomination are synonyms defined as:

predominance and predomination: the quality of being more noticeable than anything else

As nouns, predominance and predomination are synonyms defined as:

predominance and predomination: the state of being predominant over others

Other synonyms of predominance include prepotency.

predominance (noun)	predomination (noun)
the quality of being more noticeable than anything else	the quality of being more noticeable than anything else
the state of being predominant over others	the state of being predominant over others