hatch vs think up

hatch is a noun but think up is not a noun.

Word	Noun	Adjective	Verb	Adverb
hatch	Yes	No	Yes	No
think up	No	No	Yes	No

As verbs, hatch and think up are synonyms defined as:

Other synonyms of hatch include concoct, dream up, think of.

hatch (noun)	think up (noun)
a movable barrier covering a hatchway
a sloping rear car door that is lifted to open
shading consisting of multiple crossing lines
the production of young from an egg

hatch (verb)	think up (verb)
sit on (eggs)	devise or invent
emerge from the eggs
draw, cut, or engrave lines, usually parallel, on metal, wood, or paper
devise or invent
inlay with narrow strips or lines of a different substance such as gold or silver, for the purpose of decorating