"Taking for" is a common phrase used to indicate that something is assumed or believed to be true. But there are many synonyms that can be used in place of "taking for" depending on the context. Some alternative phrases that can be used include "assuming," "presuming," "supposing," "conjecturing," "postulating," and "inferring." Each of these words implies that the speaker is making an educated or intuitive guess about something. Whether in formal writing or casual conversation, using synonyms for "taking for" can help provide variety and nuance in communication.