loaf vs loaf of bread

loaf and loaf of bread both are nouns.

Word	Noun	Adjective	Verb	Adverb
loaf	Yes	No	Yes	No
loaf of bread	Yes	No	No	No

As nouns, loaf and loaf of bread are synonyms defined as:

loaf and loaf of bread: a shaped mass of baked bread that is usually sliced before eating

loaf (noun)	loaf of bread (noun)
a shaped mass of baked bread that is usually sliced before eating	a shaped mass of baked bread that is usually sliced before eating
a quantity of food (other than bread) formed in a particular shape

loaf (verb)	loaf of bread (verb)
be about a place without any apparent purpose
be lazy or idle