Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
terrĭcŭlāmenta, ōrum, n. [terricula], things that excite terror, frights, terrors (post-class.): sepulchrorum, App. Mag. 315, 27: prodigiorum, Sid. Ep. 7, 1.
Sing.: inane terriculamentum bonis hominibus, App. de Deo Socr. p. 50, 16.