sub vs nuclear submarine

nuclear submarine vs sub

sub and nuclear submarine both are nouns.

sub is a verb but nuclear submarine is not a verb.

Word	Noun	Adjective	Verb	Adverb
sub	Yes	No	Yes	No
nuclear submarine	Yes	No	No	No

As nouns, nuclear submarine is a hyponym of sub; that is, nuclear submarine is a word with a more specific, narrower meaning than sub:

sub: a submersible warship usually armed with torpedoes
nuclear submarine: a submarine that is propelled by nuclear power

Other hyponyms of sub include attack submarine, auxiliary research submarine, fleet ballistic missile submarine, nautilus, nuclear-powered submarine, U-boat.

sub (noun)	nuclear submarine (noun)
a submersible warship usually armed with torpedoes	a submarine that is propelled by nuclear power
a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States

sub (verb)	nuclear submarine (verb)
be a substitute

Difference between sub and nuclear submarine

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