flatten vs deform

flatten and deform both are verbs.

Word	Noun	Adjective	Verb	Adverb
flatten	No	No	Yes	No
deform	No	No	Yes	No

As verbs, deform is a hypernym of flatten; that is, deform is a word with a broader meaning than flatten:

Other hypernyms of flatten include change form, change shape.

flatten (verb)	deform (verb)
become flat or flatter	become misshapen
make flat or flatter	alter the shape of (something) by stress
lower the pitch of (musical notes)	assume a different shape or form
	make formless
	cause (an object) to assume a crooked or angular form
	twist and press out of shape