flip vs flip-flop

flip and flip-flop both are nouns.

Word	Noun	Adjective	Verb	Adverb
flip	Yes	Yes	Yes	No
flip-flop	Yes	No	Yes	No

As nouns, flip-flop is a hyponym of flip; that is, flip-flop is a word with a more specific, narrower meaning than flip:

flip: an acrobatic feat in which the feet roll over the head (either forward or backward) and return
flip-flop: a backward somersault

As verbs, flip and flip-flop are synonyms defined as:

flip and flip-flop: reverse (a direction, attitude, or course of action)

Other synonyms of flip include alternate, interchange, switch, tack.

flip (noun)	flip-flop (noun)
(sports) the act of throwing the ball to another member of your team	a backward somersault
the act of flipping a coin	an electronic circuit that can assume either of two stable states
a dive in which the diver somersaults before entering the water	a backless sandal held to the foot by a thong between the big toe and the second toe
an acrobatic feat in which the feet roll over the head (either forward or backward) and return	a decision to reverse an earlier decision
a sudden, quick movement
hot or cold alcoholic mixed drink containing a beaten egg

flip (adjective)	flip-flop (adjective)
marked by casual disrespect

flip (verb)	flip-flop (verb)
reverse (a direction, attitude, or course of action)	reverse (a direction, attitude, or course of action)
go mad, go crazy
react in an excited, delighted, or surprised way
throw or toss with a light motion
cause to go on or to be engaged or set in operation
turn upside down, or throw so as to reverse
move with a flick or light motion
lightly throw to see which side comes up
cause to move with a flick
toss with a sharp movement so as to cause to turn over in the air
look through a book or other written material