1.Hinge(noun):a jointed device
Synonyms:articulation,axis
Antonyms :unification,union
Example Sentence:As Grahame had surmised, she was now the hinge of Livingstone’s scheme.
2.Fixate(verb):to fix
Synonyms:haunt,infatuate
Antonyms :attend,be engrossed in
Example Sentence:The more we fixate it, the more its clearness and distinctness increase.
3.Leach(verb):to dissolve
Synonyms:extract,filter
Antonyms :weep,well
Example Sentence:Pitts had some skill as a leach, and the medicine-chest was in his care.
4.Narwal(noun):a small arctic whale
Synonyms:mammal,porpoise
Antonyms :sei,whopper
Example Sentence:The top of this totem is an exact replica of our narwhal horn.
5.Naval(adjective):relating to warships
Synonyms:marine,maritime
Antonyms :thalassic,yachting
Example Sentence:The greatest satisfaction was caused in Naval circles by these changes.