develop vs underdevelop

develop and underdevelop both are verbs.

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

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

develop: make visible by means of chemical solutions
underdevelop: process (a film or photographic plate) less than the required time or in an ineffective solution or at an insufficiently high temperature

Other hyponyms of develop include solarise, solarize, redevelop.

develop (verb)	underdevelop (verb)
come to have or undergo a change of (physical features and attributes)	process (a film or photographic plate) less than the required time or in an ineffective solution or at an insufficiently high temperature
grow, progress, unfold, or evolve through a process of evolution, natural growth, differentiation, or a conducive environment
cause to grow and differentiate in ways conforming to its natural development
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