fixation vs histology

fixation and histology both are nouns.

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

fixation (noun)	histology (noun)
(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 branch of biology that studies the microscopic structure of animal or plant tissues
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