hardboard vs chipboard

hardboard and chipboard both are nouns.

Word	Noun	Adjective	Verb	Adverb
hardboard	Yes	No	No	No
chipboard	Yes	No	No	No

As nouns, hardboard and chipboard are synonyms defined as:

hardboard and chipboard: a cheap hard material made from wood chips that are pressed together and bound with synthetic resin

hardboard (noun)	chipboard (noun)
a cheap hard material made from wood chips that are pressed together and bound with synthetic resin	a cheap hard material made from wood chips that are pressed together and bound with synthetic resin