shirt vs garment

shirt and garment both are nouns.

Word	Noun	Adjective	Verb	Adverb
shirt	Yes	No	Yes	No
garment	Yes	No	Yes	No

As nouns, garment is a hypernym of shirt; that is, garment is a word with a broader meaning than shirt:

As verbs, garment is a hypernym of shirt; that is, garment is a word with a broader meaning than shirt:

Other hypernyms of shirt include apparel, clothe, dress, enclothe, fit out, garb, habilitate, raiment, tog.

shirt (noun)	garment (noun)
a garment worn on the upper half of the body	an article of clothing

shirt (verb)	garment (verb)
put a shirt on	provide with clothes or put clothes on