land up vs obstruct

land up and obstruct both are verbs.

Word	Noun	Adjective	Verb	Adverb
land up	No	No	Yes	No
obstruct	No	No	Yes	No

As verbs, obstruct is a hypernym of land up; that is, obstruct is a word with a broader meaning than land up:

Other hypernyms of land up include block, close up, impede, jam, obturate, occlude.

land up (verb)	obstruct (verb)
finally be or do something	block passage through
block with earth, as after a landslide	shut out from view or get in the way so as to hide from sight
	hinder or prevent the progress or accomplishment of