fixation vs infantile fixation

fixation and infantile fixation both are nouns.

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

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

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

Other synonyms of fixation include arrested development, regression.

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