speculate vs develop

speculate and develop both are verbs.

Word	Noun	Adjective	Verb	Adverb
speculate	No	No	Yes	No
develop	No	No	Yes	No

As verbs, develop is a hyponym of speculate; that is, develop is a word with a more specific, narrower meaning than speculate:

Other hyponyms of speculate include construct, reconstruct, retrace, explicate, formulate.

speculate (verb)	develop (verb)
reflect deeply on a subject	come to have or undergo a change of (physical features and attributes)
to believe especially on uncertain or tentative grounds	grow, progress, unfold, or evolve through a process of evolution, natural growth, differentiation, or a conducive environment
talk over conjecturally, or review in an idle or casual way and with an element of doubt or without sufficient reason to reach a conclusion	cause to grow and differentiate in ways conforming to its natural development
invest at a risk	happen
	change the use of and make available or usable
	be gradually disclosed or unfolded; become manifest
	gain through experience
	become technologically advanced
	grow emotionally or mature
	expand in the form of a series
	elaborate by the unfolding of a musical idea and by the working out of the rhythmic and harmonic changes in the theme
	create by training and teaching
	elaborate, as of theories and hypotheses
	move into a strategically more advantageous position
	move one's pieces into strategically more advantageous positions
	superimpose a three-dimensional surface on a plane without stretching, in geometry
	work out
	make something new, such as a product or a mental or artistic creation
	generate gradually
	make visible by means of chemical solutions
	come into existence; take on form or shape