chlorambucil vs Leukeran

chlorambucil and Leukeran both are nouns.

Word	Noun	Adjective	Verb	Adverb
chlorambucil	Yes	No	No	No
Leukeran	Yes	No	No	No

As nouns, chlorambucil and Leukeran are synonyms defined as:

chlorambucil and Leukeran: an alkylating agent (trade name Leukeran) used to treat some kinds of cancer

chlorambucil (noun)	Leukeran (noun)
an alkylating agent (trade name Leukeran) used to treat some kinds of cancer	an alkylating agent (trade name Leukeran) used to treat some kinds of cancer