rack vs navigation

rack and navigation both are nouns.

Word	Noun	Adjective	Verb	Adverb
rack	Yes	No	Yes	No
navigation	Yes	No	No	No

rack (noun)	navigation (noun)
a rapid gait of a horse in which each foot strikes the ground separately	the guidance of ships or airplanes from place to place
a form of torture in which pain is inflicted by stretching the body	the work of a sailor
a support for displaying ot holding various articles	ship traffic
an instrument of torture that stretches or disjoints or mutilates victims
the destruction or collapse of something
rib section of a forequarter of veal or pork or especially lamb or mutton

rack (verb)	navigation (verb)
torture on the rack
seize together, as of parallel ropes of a tackle in order to prevent running through the block
place in a rack
work on a rack
stretch to the limits
torment emotionally or mentally
go at a rack
draw off from the lees
run before a gale
fly in high wind
obtain by coercion or intimidation
put on a rack and pinion