shackle vs pinion

shackle and pinion both are nouns.

Word	Noun	Adjective	Verb	Adverb
shackle	Yes	No	Yes	No
pinion	Yes	No	Yes	No

As verbs, shackle and pinion are synonyms defined as:

shackle (noun)	pinion (noun)
a restraint that confines or restricts freedom (especially something used to tie down or restrain a prisoner)	wing of a bird
a U-shaped bar; the open end can be passed through chain links and closed with a bar	any of the larger wing or tail feathers of a bird
	a gear with a small number of teeth designed to mesh with a larger wheel or rack

shackle (verb)	pinion (verb)
restrain with fetters	cut the wings off (of birds)
bind the arms of	bind the arms of