tuck vs rapier

tuck and rapier both are nouns.

Word	Noun	Adjective	Verb	Adverb
tuck	Yes	No	Yes	No
rapier	Yes	No	No	No

As nouns, tuck and rapier are synonyms defined as:

tuck (noun)	rapier (noun)
a narrow flattened pleat or fold that is stitched in place	a straight sword with a narrow blade and two edges
a straight sword with a narrow blade and two edges
(sports) a bodily position adopted in some sports (such as diving or skiing) in which the knees are bent and the thighs are drawn close to the chest
eatables (especially sweets)

tuck (verb)	rapier (verb)
fit snugly into
make a tuck or several folds in
draw together into folds or puckers