Plural.
hot dogs
The plural of chili is chillies. As in "these chillies are hot".
The plural of flush is flushes. As in "he had the hot flushes".
The plural of chilli is chillies. As in "these chillies are hot".
holy is an adjective and has no plural form..think about it, there is no plural form of "hot" or "old" or "round".
"hot peppers" is "piment" (or "piments" for plural) in French.
The plural form of "hot dog" is "hot dogs." When referring to multiple servings of this popular food item, simply add an "s" to the end of "dog." For example, you might say, "I bought ten hot dogs for the barbecue."
plural noun
There isn't such a thing as a "plural" or "singular" tense. The tenses are either Present, Past or Future (broadly speaking, there are several subcategories). Singular/plural refer to Number. "Hot" is an adjective, therefore is has neither tense, nor number, only degrees of comparison.
The plural is cocoas, when referring to various types of processed cocoa, or when ordering more than one cup of the hot drink.
This follows the Italian spelling rules for singular and plural. The singular is pepperoncino, plural pepperoncini. Example: "That was a hot pepperoncino!" versus "There were so many pepperoncini on my salad that I couldn't enjoy it."