undersealed vs undercoated

undersealed and undercoated both are adjectives.

Word	Noun	Adjective	Verb	Adverb
undersealed	No	Yes	No	No
undercoated	No	Yes	No	No

As adjectives, undersealed and undercoated are synonyms defined as:

undersealed and undercoated: (of motor vehicles) having a coating of tar or other rustproof material applied to the underside

undersealed (adjective)	undercoated (adjective)
(of motor vehicles) having a coating of tar or other rustproof material applied to the underside	(of motor vehicles) having a coating of tar or other rustproof material applied to the underside