square vs shape

square and shape both are nouns.

Word	Noun	Adjective	Verb	Adverb
square	Yes	Yes	Yes	Yes
shape	Yes	No	Yes	No

As nouns, shape is a hypernym of square; that is, shape is a word with a broader meaning than square:

Other hypernyms of square include form.

As verbs, shape is a hypernym of square; that is, shape is a word with a broader meaning than square:

Other hypernyms of square include form.

square (noun)	shape (noun)
a hand tool consisting of two straight arms at right angles; used to construct or test right angles	the spatial arrangement of something as distinct from its substance
any artifact having a shape similar to a plane geometric figure with four equal sides and four right angles	any spatial attributes (especially as defined by outline)
an open area at the meeting of two or more streets	the visual appearance of something or someone
a formal and conservative person with old-fashioned views	alternative names for the body of a human being
someone who doesn't understand what is going on	a perceptual structure
the product of two equal terms	a concrete representation of an otherwise nebulous concept
(geometry) a plane rectangle with four equal sides and four right angles; a four-sided regular polygon	the state of (good) health (especially in the phrases `in condition' or `in shape' or `out of condition' or `out of shape')
something approximating the shape of a square

square (adjective)	shape (adjective)
having four equal sides and four right angles or forming a right angle
characterized by honesty and fairness
rigidly conventional or old-fashioned
without evasion or compromise
leaving no balance
providing abundant nourishment

square (verb)	shape (verb)
make square	give shape or form to
raise to the second power	shape or influence; give direction to
turn the oar, while rowing	make something, usually for a specific function
turn the paddle; in canoeing
position so as to be square
pay someone and settle a debt
be compatible with
cause to match, as of ideas or acts