The noun 'Propaganda' is an uncountable noun, a type of aggregate noun, a word representing an indefinite number of elements or parts. The noun 'propaganda' has no singular form.
Propaganda. There is no "s" in case you were wondering.
The verb form of propaganda is "propagandize."
The singular form of the demonstrative pronoun 'these' is this.
The singular form of "that" is "it."
The singular form is cuff.
it is already in its singular form.
"Stratum" is the singular form of stratum. The plural form is "strata".
The adverb form of propaganda is "propagandistically."
The form hypothesis is the singular form. The plural form is hypotheses.
A singular form of dice is a die
The singular form of feet is foot.
The singular form of Oases is, Oasis.