situation vs dead end

situation and dead end both are nouns.

Word	Noun	Adjective	Verb	Adverb
situation	Yes	No	No	No
dead end	Yes	No	No	No

As nouns, dead end is a hyponym of situation; that is, dead end is a word with a more specific, narrower meaning than situation:

situation: a complex or critical or unusual difficulty
dead end: a situation in which no progress can be made or no advancement is possible

situation (noun)	dead end (noun)
a job in an organization	a passage with access only at one end
physical position in relation to the surroundings	a situation in which no progress can be made or no advancement is possible
the general state of things; the combination of circumstances at a given time
a condition or position in which you find yourself
a complex or critical or unusual difficulty