slew vs side-slip

slew is a noun but side-slip is not a noun.

Word	Noun	Adjective	Verb	Adverb
slew	Yes	No	Yes	No
side-slip	No	No	Yes	No

As verbs, side-slip is a hyponym of slew; that is, side-slip is a word with a more specific, narrower meaning than slew:

slew: move obliquely or sideways, usually in an uncontrolled manner
side-slip: slide sideways through the air in a downward direction in an airplane along an inclined lateral axis

Other hyponyms of slew include submarine, skid.

slew (noun)	side-slip (noun)
(often followed by `of') a large number or amount or extent

slew (verb)	side-slip (verb)
turn sharply; change direction abruptly	slide sideways through the air in a downward direction in an airplane along an inclined lateral axis
move obliquely or sideways, usually in an uncontrolled manner