excavate vs grub up

excavate and grub up both are verbs.

Word	Noun	Adjective	Verb	Adverb
excavate	No	No	Yes	No
grub up	No	No	Yes	No

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

Other hyponyms of excavate include grub out, nuzzle, disinter, exhume.

excavate (verb)	grub up (verb)
find by digging in the ground	dig up
remove the inner part or the core of
form by hollowing
recover through digging