siege vs beleaguering

siege and beleaguering both are nouns.

Word	Noun	Adjective	Verb	Adverb
siege	Yes	No	No	No
beleaguering	Yes	No	No	No

As nouns, siege and beleaguering are synonyms defined as:

siege and beleaguering: the action of an armed force that surrounds a fortified place and isolates it while continuing to attack

Other synonyms of siege include besieging, military blockade.

siege (noun)	beleaguering (noun)
the action of an armed force that surrounds a fortified place and isolates it while continuing to attack	the action of an armed force that surrounds a fortified place and isolates it while continuing to attack