RichThesaurus
able to stand on one's own two feet
vs
self-contained
able to stand on one's own two feet
self-contained
adj
Wrapped up in oneself; reserved.
Not requiring external or additional support; complete in itself.
How often have the words
able to stand on one's own two feet
and
self-contained
occurred in a corpus of books?
(source:
Google Ngram Viewer
)