skulker vs malingerer

skulker and malingerer both are nouns.

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

As nouns, skulker and malingerer are synonyms defined as:

skulker and malingerer: someone shirking their duty by feigning illness or incapacity

Other synonyms of skulker include shammer.

skulker (noun)	malingerer (noun)
someone waiting in concealment	someone shirking their duty by feigning illness or incapacity
someone shirking their duty by feigning illness or incapacity