dower vs estate for life

dower and estate for life both are nouns.

Word	Noun	Adjective	Verb	Adverb
dower	Yes	No	Yes	No
estate for life	Yes	No	No	No

As nouns, estate for life is a hypernym of dower; that is, estate for life is a word with a broader meaning than dower:

dower: a life estate to which a wife is entitled on the death of her husband
estate for life: (law) an estate whose duration is limited to the life of the person holding it

Other hypernyms of dower include life estate.

dower (noun)	estate for life (noun)
a life estate to which a wife is entitled on the death of her husband	(law) an estate whose duration is limited to the life of the person holding it
money or property brought by a woman to her husband at marriage

dower (verb)	estate for life (verb)
furnish with an endowment