The antonyms for the word "more fructiferous" are largely negative, with most invoking a lack of productivity or fruitfulness. These might include terms such as barren, unproductive, fruitless, infertile or unprofitable. Alternatively, antonyms might suggest a lack of abundance, such as scarce or sparse. Other terms that may be considered as antonyms for "more fructiferous" include words that indicate a loss of growth or vitality, including words like withering, dying, blighted or fading. In general, antonyms for "more fructiferous" all share a similar theme of a lack of productivity or abundance, suggesting a failure to thrive or prosper.