blue tit vs tomtit

blue tit and tomtit both are nouns.

Word	Noun	Adjective	Verb	Adverb
blue tit	Yes	No	No	No
tomtit	Yes	No	No	No

As nouns, blue tit and tomtit are synonyms defined as:

blue tit and tomtit: widely distributed European titmouse with bright cobalt blue wings and tail and crown of the head

Other synonyms of blue tit include Parus caeruleus.

blue tit (noun)	tomtit (noun)
widely distributed European titmouse with bright cobalt blue wings and tail and crown of the head	widely distributed European titmouse with bright cobalt blue wings and tail and crown of the head