sensation vs expert

sensation and expert both are nouns.

Word	Noun	Adjective	Verb	Adverb
sensation	Yes	No	No	No
expert	Yes	Yes	No	No

As nouns, expert is a hypernym of sensation; that is, expert is a word with a broader meaning than sensation:

sensation (noun)	expert (noun)
an unelaborated elementary awareness of stimulation	a person with special knowledge or ability who performs skillfully
the faculty through which the external world is apprehended
a general feeling of excitement and heightened interest
someone who is dazzlingly skilled in any field
a state of widespread public excitement and interest

sensation (adjective)	expert (adjective)
	having or showing knowledge and skill and aptitude
	of or relating to or requiring special knowledge to be understood