situation vs epitope

situation and epitope both are nouns.

Word	Noun	Adjective	Verb	Adverb
situation	Yes	No	No	No
epitope	Yes	No	No	No

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

situation: physical position in relation to the surroundings
epitope: the site on the surface of an antigen molecule to which an antibody attaches itself

situation (noun)	epitope (noun)
a job in an organization	the site on the surface of an antigen molecule to which an antibody attaches itself
physical position in relation to the surroundings
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