histology vs fixation

histology and fixation both are nouns.

Word	Noun	Adjective	Verb	Adverb
histology	Yes	No	No	No
fixation	Yes	No	No	No

histology (noun)	fixation (noun)
the branch of biology that studies the microscopic structure of animal or plant tissues	(histology) the preservation and hardening of a tissue sample to retain as nearly as possible the same relations they had in the living body
	the activity of fastening something firmly in position
	an unhealthy and compulsive preoccupation with something or someone
	an abnormal state in which development has stopped prematurely