bust vs tear up

bust is a noun but tear up is not a noun.

Word	Noun	Adjective	Verb	Adverb
bust	Yes	Yes	Yes	No
tear up	No	No	Yes	No

As verbs, tear up is a hyponym of bust; that is, tear up is a word with a more specific, narrower meaning than bust:

Other hyponyms of bust include lacerate, pull, rend, rip, rive, rip up, shred.

bust (noun)	tear up (noun)
an occasion for excessive eating or drinking
a sculpture of the head and shoulders of a person
the chest of a woman
a complete failure

bust (adjective)	tear up (adjective)
lacking funds

bust (verb)	tear up (verb)
break open or apart suddenly and forcefully	tear into shreds
go to pieces
ruin completely
separate or cause to separate abruptly
search without warning, make a sudden surprise attack on