grow vs work up

grow and work up both are verbs.

Word	Noun	Adjective	Verb	Adverb
grow	No	No	Yes	No
work up	No	No	Yes	No

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

grow: come to have or undergo a change of (physical features and attributes)
work up: develop

Other hyponyms of grow include feather, fledge, regrow, spring, sprout, stock, stool, tiller, leaf, pod, teethe, pupate, get up, cut.

grow (verb)	work up (verb)
come to have or undergo a change of (physical features and attributes)	develop
become larger, greater, or bigger; expand or gain	form or accumulate steadily
cause to grow or develop	come up with
increase in size by natural process	bolster or strengthen
pass into a condition gradually, take on a specific property or attribute; become
develop and reach maturity; undergo maturation
grow emotionally or mature
become attached by or as if by the process of growth
cultivate by growing, often involving improvements by means of agricultural techniques
come into existence; take on form or shape