seize vs snatch up

seize and snatch up both are verbs.

Word	Noun	Adjective	Verb	Adverb
seize	No	No	Yes	No
snatch up	No	No	Yes	No

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

seize (verb)	snatch up (verb)
capture the attention or imagination of	to grasp hastily or eagerly
affect
take into your hands deliberately
take or capture by force
hook by a pull on the line
take possession of by force, as after an invasion
take temporary possession of as a security, by legal authority
seize and take control without authority and possibly with force; take as one's right or possession