lump vs swelling

lump and swelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
lump	Yes	No	Yes	No
swelling	Yes	No	No	No

As nouns, lump and swelling are synonyms defined as:

Other synonyms of lump include puffiness.

lump (noun)	swelling (noun)
a compact mass	the increase in volume of certain substances when they are heated (often accompanied by release of water)
a large piece of something without definite shape	something that bulges out or is protuberant or projects from its surroundings
an awkward stupid person	an abnormal protuberance or localized enlargement
an abnormal protuberance or localized enlargement

lump (verb)	swelling (verb)
group or chunk together in a certain order or place side by side
put together indiscriminately