washbowl vs washbasin

washbowl and washbasin both are nouns.

Word	Noun	Adjective	Verb	Adverb
washbowl	Yes	No	No	No
washbasin	Yes	No	No	No

As nouns, washbowl and washbasin are synonyms defined as:

Other synonyms of washbowl include handbasin, lavabo, wash-hand basin.

As nouns, washbowl and washbasin are synonyms defined as:

washbowl and washbasin: a bathroom sink that is permanently installed and connected to a water supply and drainpipe; where you can wash your hands and face

Other synonyms of washbowl include basin, lavatory, washstand.

washbowl (noun)	washbasin (noun)
a basin for washing the hands	a basin for washing the hands
a bathroom sink that is permanently installed and connected to a water supply and drainpipe; where you can wash your hands and face	a bathroom sink that is permanently installed and connected to a water supply and drainpipe; where you can wash your hands and face