Sentence:  The mere advent of the Spiritual Science Chair seemed to have been received as a beacon of opportunity for all manner of <WSD>credophiles</WSD>, so I guessed, rightly, that Miriam would come a-running if I dangled the prospect of an alternative analysis of the efficacy of homeopathic remedies. 
Meaning of the word marked with <WSD> tags:  One who is especially gullible.