wash-hand basin vs lavabo

wash-hand basin and lavabo both are nouns.

Word	Noun	Adjective	Verb	Adverb
wash-hand basin	Yes	No	No	No
lavabo	Yes	No	No	No

As nouns, wash-hand basin and lavabo are synonyms defined as:

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

wash-hand basin (noun)	lavabo (noun)
a basin for washing the hands	a basin for washing the hands