shirker vs malingerer

shirker and malingerer both are nouns.

Word	Noun	Adjective	Verb	Adverb
shirker	Yes	No	No	No
malingerer	Yes	No	No	No

As nouns, malingerer is a hyponym of shirker; that is, malingerer is a word with a more specific, narrower meaning than shirker:

shirker: a person who shirks his work or duty (especially one who tries to evade military service in wartime)
malingerer: someone shirking their duty by feigning illness or incapacity

Other hyponyms of shirker include goldbrick, shammer, skulker, scrimshanker.

shirker (noun)	malingerer (noun)
a person who shirks his work or duty (especially one who tries to evade military service in wartime)	someone shirking their duty by feigning illness or incapacity