baby carriage vs baby buggy

baby carriage and baby buggy both are nouns.

Word	Noun	Adjective	Verb	Adverb
baby carriage	Yes	No	No	No
baby buggy	Yes	No	No	No

As nouns, baby carriage and baby buggy are synonyms defined as:

baby carriage and baby buggy: a small vehicle with four wheels in which a baby or child is pushed around

Other synonyms of baby carriage include carriage, go-cart, perambulator, pram, pushchair, pusher, stroller.

baby carriage (noun)	baby buggy (noun)
a small vehicle with four wheels in which a baby or child is pushed around	a small vehicle with four wheels in which a baby or child is pushed around