single word requests - Past participle used as a noun?

In Marcella Frank (1972), Modern English Grammar, Gerund phrases -ing verb forms function as noun and place noun functions in sentence structure(s). She ignored 'past participle' as the gerund without reason. However, in the theory of gerund, gerund should be in participial forms (V-ing, Being V-ed, Having V-ed, and V-ed) but, V-ed or past participle is rejected to be gerund. Is that included gerund? However, language is an arbritrary symbols. Grammarians may not include 'past participle' as gerund since it is rarely used. But, theoretically, that is a derivation of verb forms to be noun not adjective. Some examples include 'unintended' in Muse's single, the 'accused' in Law term, undecided, anointed, concerned, condemmed, conducted, distressed, educated, sacred, illuminated, inverted, throughbred, knitted, nonaligned, nonsched, colored, married, half-bred, beloved, classified, and many other are found in famous writings and functioned as noun explicitly in sentence structure.