coaster vs mover

coaster and mover both are nouns.

Word	Noun	Adjective	Verb	Adverb
coaster	Yes	No	No	No
mover	Yes	No	No	No

As nouns, mover is a hypernym of coaster; that is, mover is a word with a broader meaning than coaster:

coaster (noun)	mover (noun)
a covering (plate or mat) that protects the surface of a table (i.e., from the condensation on a cold glass or bottle)	a company that moves the possessions of a family or business from one site to another
someone who coasts	someone who moves
a resident of a coastal area	(parliamentary procedure) someone who makes a formal motion
	workman employed by a moving company