obligatory

As adjectives the difference between obligatory and complimentary

is that obligatory is imposing obligation, morally or legally; binding while complimentary is in the nature of a compliment.

Obligatory is a related term of styptic.

As adjectives the difference between obligatory and styptic

is that obligatory is imposing obligation, morally or legally; binding while styptic is bringing about contraction of tissues; harsh, raw, austere.

As a noun styptic is

a substance used for styptic results.

Unavoidable is a related term of obligatory.

As adjectives the difference between unavoidable and obligatory

is that unavoidable is impossible to avoid; bound to happen while obligatory is imposing obligation, morally or legally; binding.

As a noun unavoidable

is something that cannot be avoided.

As an adjective obligatory is

imposing obligation, morally or legally; binding.

Unwilling is a related term of obligatory.

As adjectives the difference between unwilling and obligatory

is that unwilling is not willing; loath; disinclined; reluctant; as, an unwilling servant while obligatory is imposing obligation, morally or legally; binding.

As a verb require

is (label) to ask (someone) for something; to request.

As an adjective obligatory is

imposing obligation, morally or legally; binding.

As a verb enforced

is past tense of enforce.

As an adjective obligatory is

imposing obligation, morally or legally; binding.

Incontrovertible is a related term of obligatory.

As adjectives the difference between incontrovertible and obligatory

is that incontrovertible is not capable of being denied, challenged, or disputed; closed to questioning while obligatory is imposing obligation, morally or legally; binding.

Obligatory is a related term of constrained.

As adjectives the difference between obligatory and constrained

is that obligatory is imposing obligation, morally or legally; binding while constrained is within close bounds; confined.

As a verb constrained is

(constrain).