little hand vs hour hand

little hand and hour hand both are nouns.

Word	Noun	Adjective	Verb	Adverb
little hand	Yes	No	No	No
hour hand	Yes	No	No	No

As nouns, little hand and hour hand are synonyms defined as:

little hand and hour hand: the shorter hand of a clock that points to the hours

little hand (noun)	hour hand (noun)
the shorter hand of a clock that points to the hours	the shorter hand of a clock that points to the hours