overburdened vs loaded down

overburdened and loaded down both are adjectives.

Word	Noun	Adjective	Verb	Adverb
overburdened	No	Yes	No	No
loaded down	No	Yes	No	No

As adjectives, overburdened and loaded down are synonyms defined as:

Other synonyms of overburdened include bowed down, weighed down.

overburdened (adjective)	loaded down (adjective)
heavily burdened with work or cares	heavily burdened with work or cares
	bearing a physically heavy weight or load