yaw vs sheer

yaw is a noun but sheer is not a noun.

Word	Noun	Adjective	Verb	Adverb
yaw	Yes	No	Yes	No
sheer	No	Yes	Yes	Yes

As verbs, sheer is a hypernym of yaw; that is, sheer is a word with a broader meaning than yaw:

Other hypernyms of yaw include curve, cut, slew, slue, swerve, trend, veer.

yaw (noun)	sheer (noun)
an erratic deflection from an intended course

yaw (adjective)	sheer (adjective)
	complete and without restriction or qualification; sometimes used informally as intensifiers
	not mixed with extraneous elements
	very steep; having a prominent and almost vertical front
	so thin as to transmit light

yaw (verb)	sheer (verb)
deviate erratically from a set course	turn sharply; change direction abruptly
swerve off course momentarily	cause to sheer
be wide open

yaw (adverb)	sheer (adverb)
	completely
	straight up or down without a break