say vs allege

say is a noun but allege is not a noun.

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

As verbs, say and allege are synonyms defined as:

Other synonyms of say include aver.

say (noun)	allege (noun)
the chance to speak

say (verb)	allege (verb)
express in words	report or maintain
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