speculation vs contemplation

speculation and contemplation both are nouns.

Word	Noun	Adjective	Verb	Adverb
speculation	Yes	No	No	No
contemplation	Yes	No	No	No

As nouns, contemplation is a hypernym of speculation; that is, contemplation is a word with a broader meaning than speculation:

speculation: continuous and profound contemplation or musing on a subject or series of subjects of a deep or abstruse nature
contemplation: a calm, lengthy, intent consideration

Other hypernyms of speculation include musing, reflection, reflexion, rumination, thoughtfulness.

speculation (noun)	contemplation (noun)
a hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence)	a long and thoughtful observation
continuous and profound contemplation or musing on a subject or series of subjects of a deep or abstruse nature	a calm, lengthy, intent consideration
a message expressing an opinion based on incomplete evidence
an investment that is very risky but could yield great profits