notional vs speculative

notional and speculative both are adjectives.

Word	Noun	Adjective	Verb	Adverb
notional	No	Yes	No	No
speculative	No	Yes	No	No

As adjectives, notional and speculative are synonyms defined as:

notional (adjective)	speculative (adjective)
being of the nature of a notion or concept	showing curiosity
indulging in or influenced by fancy	not based on fact or investigation
not based on fact or investigation	not financially safe or secure
not based on fact; existing only in the imagination