swob vs dry mop

swob and dry mop both are nouns.

Word	Noun	Adjective	Verb	Adverb
swob	Yes	No	Yes	No
dry mop	Yes	No	No	No

As nouns, dry mop is a hyponym of swob; that is, dry mop is a word with a more specific, narrower meaning than swob:

swob: cleaning implement consisting of absorbent material fastened to a handle; for cleaning floors
dry mop: a dry swab for dusting floors

Other hyponyms of swob include dust mop, dustmop, sponge mop.

swob (noun)	dry mop (noun)
cleaning implement consisting of absorbent material fastened to a handle; for cleaning floors	a dry swab for dusting floors

swob (verb)	dry mop (verb)
wash with a swab or a mop
apply (usually a liquid) to a surface