Yes, the word 'truce' is a noun, a singular, common, abstract noun; a word for a temporary cessation to fighting.
Written records of truce violationsAPEX
The Truce was created in 1957.
they made a truce
The Truce has 253 pages.
reactions for truce in the forest
A truce is not a propositional phrase; rather, it is a noun that refers to an agreement between parties to stop fighting or arguing. A propositional phrase, on the other hand, typically consists of a preposition and its object, functioning as a modifier in a sentence. For example, "in the garden" or "with great enthusiasm" are propositional phrases. Thus, a truce is a concept or event, while a propositional phrase serves a grammatical function.
Let's call a truce. This minor incursion shall not damage the truce between our countries.
The word "truce" is spelt just as you have in the question.
There is no way to break a truce.
Christmas truce happened in 1914.
Truce of Pläswitz happened in 1813.
No Truce with Kings was created in 1963.