alimentation vs TPN

alimentation and TPN both are nouns.

Word	Noun	Adjective	Verb	Adverb
alimentation	Yes	No	No	No
TPN	Yes	No	No	No

As nouns, TPN is a hyponym of alimentation; that is, TPN is a word with a more specific, narrower meaning than alimentation:

alimentation: the act of supplying food and nourishment
TPN: administration of a nutritionally adequate solution through a catheter into the vena cava; used in cases of long-term coma or severe burns or severe gastrointestinal syndromes

alimentation (noun)	TPN (noun)
the act of supplying food and nourishment	administration of a nutritionally adequate solution through a catheter into the vena cava; used in cases of long-term coma or severe burns or severe gastrointestinal syndromes
a source of materials to nourish the body