somatosensory system vs somesthesis

somatosensory system and somesthesis both are nouns.

Word	Noun	Adjective	Verb	Adverb
somatosensory system	Yes	No	No	No
somesthesis	Yes	No	No	No

As nouns, somatosensory system and somesthesis are synonyms defined as:

somatosensory system and somesthesis: the faculty of bodily perception; sensory systems associated with the body; includes skin senses and proprioception and the internal organs

somatosensory system (noun)	somesthesis (noun)
the faculty of bodily perception; sensory systems associated with the body; includes skin senses and proprioception and the internal organs	the faculty of bodily perception; sensory systems associated with the body; includes skin senses and proprioception and the internal organs