preface vs say

preface and say both are nouns.

Word	Noun	Adjective	Verb	Adverb
preface	Yes	No	Yes	No
say	Yes	No	Yes	No

As verbs, say is a hypernym of preface; that is, say is a word with a broader meaning than preface:

Other hypernyms of preface include state, tell.

preface (noun)	say (noun)
a short introductory essay preceding the text of a book	the chance to speak

preface (verb)	say (verb)
furnish with a preface or introduction	express in words
	report or maintain
	speak, pronounce, or utter in a certain way
	express a supposition
	give instructions to or direct somebody to do something with authority
	communicate or express nonverbally
	recite or repeat a fixed text
	indicate
	state as one's opinion or judgement; declare
	utter aloud
	have or contain a certain wording or form