charwoman vs cleaning woman

charwoman and cleaning woman both are nouns.

Word	Noun	Adjective	Verb	Adverb
charwoman	Yes	No	No	No
cleaning woman	Yes	No	No	No

As nouns, charwoman and cleaning woman are synonyms defined as:

Other synonyms of charwoman include char, cleaning lady.

charwoman (noun)	cleaning woman (noun)
a human female employed to do housework	a human female employed to do housework