teensy vs itsy-bitsy

teensy and itsy-bitsy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
teensy	No	Yes	No	No
itsy-bitsy	No	Yes	No	No

As adjectives, teensy and itsy-bitsy are synonyms defined as:

Other synonyms of teensy include bittie, bitty, itty-bitty, teensy-weensy, teentsy, teeny-weeny, teeny, wee, weensy, weeny.

teensy (adjective)	itsy-bitsy (adjective)
(used informally) little or tiny	(used informally) little or tiny