spheroid vs round shape

spheroid and round shape both are nouns.

Word	Noun	Adjective	Verb	Adverb
spheroid	Yes	No	No	No
round shape	Yes	No	No	No

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

spheroid: a shape that is generated by rotating an ellipse around one of its axes
round shape: a shape that is curved and without sharp angles

spheroid (noun)	round shape (noun)
a shape that is generated by rotating an ellipse around one of its axes	a shape that is curved and without sharp angles