early childhood vs oral stage

early childhood and oral stage both are nouns.

Word	Noun	Adjective	Verb	Adverb
early childhood	Yes	No	No	No
oral stage	Yes	No	No	No

early childhood (noun)	oral stage (noun)
the early stage of growth or development	(psychoanalysis) the first sexual and social stage of an infant's development; the mouth is the focus of the libido and satisfaction comes from suckling and chewing and biting