shoring vs shoring up

shoring and shoring up both are nouns.

Word	Noun	Adjective	Verb	Adverb
shoring	Yes	No	No	No
shoring up	Yes	No	No	No

As nouns, shoring and shoring up are synonyms defined as:

Other synonyms of shoring include propping up.

shoring (noun)	shoring up (noun)
the act of propping up with shores	the act of propping up with shores
a beam or timber that is propped against a structure to provide support