sensation vs threshold

sensation and threshold both are nouns.

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

As nouns, threshold is a hyponym of sensation; that is, threshold is a word with a more specific, narrower meaning than sensation:

sensation (noun)	threshold (noun)
an unelaborated elementary awareness of stimulation	the sill of a door; a horizontal piece of wood or stone that forms the bottom of a doorway and offers support when passing through a doorway
the faculty through which the external world is apprehended	the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close
a general feeling of excitement and heightened interest	the smallest detectable sensation
someone who is dazzlingly skilled in any field	a region marking a boundary
a state of widespread public excitement and interest	the starting point for a new state or experience