ruinam
ruinam is a Latin form of ruina, meaning “fall, collapse; ruin, destruction; (pl.) ruins”. It is the accusative singular feminine noun.
Found 61 times in the Latin texts on Socratos.
Where it is used
Cicero, Pro L. Flacco 24: Vtrum hic tandem disceptationem et cognitionem veritatis, an innocentiae labem aliquam aut ruinam fore putatis? multa enim sunt eius modi, iudices, ut, etiam si in homine ipso de quo agitur neglegenda sint, …
Phaedrus, Fabulae 2.4.21: Ruinam metuens aquila ramis desidet;
All forms of ruina (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.