Pennant is a see also of flag.
As nouns the difference between pennant and flag
is that pennant
is a flag normally used by naval vessels to represent a special condition while flag
is a piece of cloth, often decorated with an emblem, used as a visual signal or symbol or flag
can be any of various plants with sword-shaped leaves, especially irises; specifically, iris pseudacorus
can be a slice of turf; a sod.
As a verb flag is
to furnish or deck out with flags or flag
can be to weaken, become feeble or flag
can be to lay down flagstones.