consider vs mull over

consider and mull over both are verbs.

Word	Noun	Adjective	Verb	Adverb
consider	No	No	Yes	No
mull over	No	No	Yes	No

As verbs, mull over is a hypernym of consider; that is, mull over is a word with a broader meaning than consider:

consider (verb)	mull over (verb)
deem to be	reflect deeply on a subject
take into consideration for exemplifying purposes
regard or treat with consideration, respect, and esteem
judge or regard; look upon; judge
show consideration for; take into account
think about carefully; weigh
give careful consideration to
look at attentively
look at carefully; study mentally