As verbs the difference between contemplate and foresee

is that contemplate is to look at on all sides or in all its aspects; to view or consider with continued attention; to regard with deliberate care; to meditate on; to study, ponder, or consider while foresee is to anticipate; to predict.

As adjectives the difference between navigable and nautical

is that navigable is (of a body of water) capable of being navigated; deep enough and wide enough to afford passage to vessels while nautical is relating to or involving ships or shipping or navigation or seamen.

In obsolete|lang=en terms the difference between danger and haste

is that danger is (obsolete) to run the risk while haste is (obsolete) hurry; urgency; sudden excitement of feeling or passion; precipitance; vehemence.

As nouns the difference between danger and haste

is that danger is (obsolete) ability to harm; someone's dominion or power to harm or penalise see in one's danger, below while haste is speed; swiftness; dispatch.

As verbs the difference between danger and haste

is that danger is (obsolete) to claim liability while haste is to urge onward; to hasten.

As nouns the difference between disruption and devastation

is that disruption is an interruption to the regular flow or sequence of something while devastation is devastation, destruction.

As a noun disruption

is an interruption to the regular flow or sequence of something.

As an adjective devastating is

causing devastation.

As a verb devastating is

.

As nouns the difference between covenant and swear

is that covenant is an agreement to do or not do a particular thing while swear is a swearword.

As verbs the difference between covenant and swear

is that covenant is to enter into, or promise something by, a covenant while swear is to take an oath.

As an adjective swear is

heavy.

As adjectives the difference between keen and concerned

is that keen is showing a quick and ardent willingness or responsiveness, enthusiastic, eager; interested, intense while concerned is showing concern.

As verbs the difference between keen and concerned

is that keen is (rare) to sharpen; to make cold or keen can be to utter a keen while concerned is (concern).

As a noun keen

is a prolonged wail for a deceased person.

As a noun autocracy

is a form of government in which unlimited power is held by a single individual.

As an adjective heteronomous is

arising from an external influence, force, or agency; not autonomous.

As adjectives the difference between diehard and reactionary

is that diehard is unreasonably or stubbornly resisting change while reactionary is opposed to change; urging a return to a previous state.

As nouns the difference between diehard and reactionary

is that diehard is a person with such an attitude while reactionary is one who is opposed to change.

As adjectives the difference between probable and undefined

is that probable is likely or most likely to be true while undefined is lacking a definition or value.