think of vs contemplate

think of and contemplate both are verbs.

Word	Noun	Adjective	Verb	Adverb
think of	No	No	Yes	No
contemplate	No	No	Yes	No

As verbs, contemplate is a hypernym of think of; that is, contemplate is a word with a broader meaning than think of:

think of (verb)	contemplate (verb)
keep in mind for attention or consideration	think intently and at length, as for spiritual purposes
look on as or consider	reflect deeply on a subject
intend to refer to	consider as a possibility
take into consideration, have in view	look at thoughtfully; observe deep in thought
choose in one's mind
devise or invent