ponderer vs ruminator

ponderer and ruminator both are nouns.

Word	Noun	Adjective	Verb	Adverb
ponderer	Yes	No	No	No
ruminator	Yes	No	No	No

As nouns, ponderer and ruminator are synonyms defined as:

ponderer and ruminator: a reflective thinker characterized by quiet contemplation

Other synonyms of ponderer include muller, muser.

ponderer (noun)	ruminator (noun)
a reflective thinker characterized by quiet contemplation	a reflective thinker characterized by quiet contemplation