toddler vs yearling

toddler and yearling both are nouns.

Word	Noun	Adjective	Verb	Adverb
toddler	Yes	No	No	No
yearling	Yes	No	No	No

As nouns, toddler and yearling are synonyms defined as:

Other synonyms of toddler include bambino, tot.

toddler (noun)	yearling (noun)
a young child who is just beginning to walk	an animal in its second year
	a racehorse considered one year old until the second Jan. 1 following its birth
	a young child who is just beginning to walk