think vs conceive

think is a noun but conceive is not a noun.

Word	Noun	Adjective	Verb	Adverb
think	Yes	No	Yes	No
conceive	No	No	Yes	No

As verbs, think and conceive are synonyms defined as:

Other synonyms of think include believe, consider.

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

Other hypernyms of think include believe, consider, think.

think (noun)	conceive (noun)
an instance of deliberate thinking

think (verb)	conceive (verb)
bring into a given condition by mental preoccupation	become pregnant; undergo conception
use or exercise the mind or one's power of reason in order to make inferences, decisions, or arrive at a solution or judgments	judge or regard; look upon; judge
judge or regard; look upon; judge	have the idea for
recall knowledge from memory; have a recollection
expect, believe, or suppose
have in mind as a purpose
be capable of conscious thought
focus one's attention on a certain state
decide by pondering, reasoning, or reflecting
ponder; reflect on, or reason about
have or formulate in the mind
dispose the mind in a certain way
imagine or visualize