overburdened vs weighed down

overburdened and weighed down both are adjectives.

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

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

Other synonyms of overburdened include bowed down, loaded down.

overburdened (adjective)	weighed down (adjective)
heavily burdened with work or cares	heavily burdened with work or cares
	full of; bearing great weight