pregnancy vs physical condition

pregnancy and physical condition both are nouns.

Word	Noun	Adjective	Verb	Adverb
pregnancy	Yes	No	No	No
physical condition	Yes	No	No	No

As nouns, physical condition is a hypernym of pregnancy; that is, physical condition is a word with a broader meaning than pregnancy:

pregnancy: the state of being pregnant; the period from conception to birth when a woman carries a developing fetus in her uterus
physical condition: the condition or state of the body or bodily functions

Other hypernyms of pregnancy include physiological condition, physiological state.

pregnancy (noun)	physical condition (noun)
the state of being pregnant; the period from conception to birth when a woman carries a developing fetus in her uterus	the condition or state of the body or bodily functions