Hello, do you think it's okay to use "sage" as a synonym for" old soul"?
An 'old soul' is a person who seems to have the soul of someone old within their younger body. This is a person who seems wiser and more mature than they should be for their age.
sage 1 (sāj)
n. One venerated for experience, judgment, and wisdom.
adj. sag∑er, sag∑est
- Having or exhibiting wisdom and calm judgment.
- Proceeding from or marked by wisdom and calm judgment: sage advice.
- Archaic Serious; solemn.
As you can see, they are not exactly synonyms.
Having said all that, in the context of your sentence, you could use this word instead of 'old soul' if the above definition holds true for the person you are referring to.
I hope this response was helpful to you,