encumber vs restrain

encumber and restrain both are verbs.

Word	Noun	Adjective	Verb	Adverb
encumber	No	No	Yes	No
restrain	No	No	Yes	No

As verbs, encumber and restrain are synonyms defined as:

encumber and restrain: restrict (someone or something) so as to make free movement difficult

Other synonyms of encumber include cumber.

encumber (verb)	restrain (verb)
restrict (someone or something) so as to make free movement difficult	prevent the action or expression of
	to close within bounds, or otherwise limit or deprive of free movement
	restrict (someone or something) so as to make free movement difficult
	prevent (someone or something) from doing something