I cannot find an antonym for to suggest with the force of to suggest that p is false if to suggest is used with the force of to suggest that p is true. The context is a sentence that looks approximately like:
The proposition that proper names have senses is suggested by P. The proposition that proper names are definitionally equivalent to definite descriptions is [...] by Q.
Where P and Q are lists of reasons that aren't important here. The meaning of the passage should be equivalent to the following:
The truth of the proposition that proper names have senses is suggests by P. The falsity of the proposition that proper names are definitionally equivalent to definite descriptions is suggested by Q.
I recall having attempted to find a suitable word to replace [...] in the first set of sentences before. However, I was unsuccessful and rephrased the passage. Even if the passage would work best rephrased, such a word would be useful For reference, the context is an introduction to a discussion of the problems raised by P and Q.