RichThesaurus
fruitless
vs
nonvaluable
fruitless
adj
Unproductive, useless.
Of a diet, etc.: without fruit.
Bearing no fruit; barren.
nonvaluable
adj
Not valuable.
How often have the words
fruitless
and
nonvaluable
occurred in a corpus of books?
(source:
Google Ngram Viewer
)