infantile fixation vs fixation

infantile fixation and fixation both are nouns.

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

As nouns, infantile fixation and fixation are synonyms defined as:

infantile fixation and fixation: an abnormal state in which development has stopped prematurely

Other synonyms of infantile fixation include arrested development, regression.

infantile fixation (noun)	fixation (noun)
an abnormal state in which development has stopped prematurely	(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