swamp vs swampland

swamp and swampland both are nouns.

Word	Noun	Adjective	Verb	Adverb
swamp	Yes	No	Yes	No
swampland	Yes	No	No	No

As nouns, swamp and swampland are synonyms defined as:

swamp and swampland: low land that is seasonally flooded; has more woody plants than a marsh and better drainage than a bog

swamp (noun)	swampland (noun)
low land that is seasonally flooded; has more woody plants than a marsh and better drainage than a bog	low land that is seasonally flooded; has more woody plants than a marsh and better drainage than a bog
a situation fraught with difficulties and imponderables

swamp (verb)	swampland (verb)
fill quickly beyond capacity; as with a liquid
drench or submerge or be drenched or submerged