ice wagon vs ice-wagon

ice wagon and ice-wagon both are nouns.

Word	Noun	Adjective	Verb	Adverb
ice wagon	Yes	No	No	No
ice-wagon	Yes	No	No	No

As nouns, ice wagon and ice-wagon are synonyms defined as:

ice wagon and ice-wagon: (formerly) a horse-drawn wagon that delivered ice door to door

ice wagon (noun)	ice-wagon (noun)
(formerly) a horse-drawn wagon that delivered ice door to door	(formerly) a horse-drawn wagon that delivered ice door to door