filtrate vs separate out

filtrate is a noun but separate out is not a noun.

Word	Noun	Adjective	Verb	Adverb
filtrate	Yes	No	Yes	No
separate out	No	No	Yes	No

As verbs, filtrate and separate out are synonyms defined as:

Other synonyms of filtrate include filter, filter out, strain.

filtrate (noun)	separate out (noun)
the product of filtration; a gas or liquid that has been passed through a filter

filtrate (verb)	separate out (verb)
remove by passing through a filter	remove by passing through a filter